{"id":2766,"date":"2021-06-06T11:38:31","date_gmt":"2021-06-06T06:08:31","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=2766"},"modified":"2021-06-20T19:37:13","modified_gmt":"2021-06-20T14:07:13","slug":"day-zero-mean-median-mode-solution","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/","title":{"rendered":"Day 0: Mean, Median, and Mode | 10 Days Of Statistics | HackerRank Solution"},"content":{"rendered":"\n<p>Hello coders, today we are going to solve <strong>Day 0: Mean, Median, and Mode HackerRank Solution<\/strong> which is a part of <strong>10 Days of Statistics<\/strong> Series.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"677\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/06\/day-zero-mean-median-mode-statistics-solution-codingbroz.png\" alt=\"Day 0: Mean, Median, and Mode\" class=\"wp-image-2769\" srcset=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/06\/day-zero-mean-median-mode-statistics-solution-codingbroz.png 1200w, https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/06\/day-zero-mean-median-mode-statistics-solution-codingbroz-768x433.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-662cb7992105d\" class=\"ez-toc-cssicon-toggle-label\"><label class=\"ez-toc-title\">Table of Contents<\/label>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0090ff;color:#0090ff\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0090ff;color:#0090ff\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-662cb7992105d\" checked \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/#Objective\" title=\"Objective\">Objective<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/#Task\" title=\"Task\">Task<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/#Input_Format\" title=\"Input Format\">Input Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/#Constraints\" title=\"Constraints\">Constraints<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/#Output_Format\" title=\"Output Format\">Output Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/#Explanation\" title=\"Explanation\">Explanation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/#Solution_%E2%80%93_Day_0_Mean_Median_and_Mode_Solution\" title=\"Solution &#8211; Day 0: Mean, Median, and Mode Solution\">Solution &#8211; Day 0: Mean, Median, and Mode Solution<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/#C\" title=\"C++\">C++<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.codingbroz.com\/day-zero-mean-median-mode-solution\/#Python\" title=\"Python\">Python<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Objective\"><\/span><strong>Objective<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In this challenge, we practice calculating the&nbsp;<em>mean<\/em>,&nbsp;<em>median<\/em>, and&nbsp;<em>mode<\/em>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Task\"><\/span><strong>Task<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Given an array,&nbsp;<strong><em>X<\/em><\/strong>, of&nbsp;<strong><em>N<\/em><\/strong>&nbsp;integers, calculate and print the respective&nbsp;<em>mean<\/em>,&nbsp;<em>median<\/em>, and&nbsp;<em>mode<\/em>&nbsp;on separate lines. If your array contains more than one&nbsp;<em>modal value<\/em>, choose the numerically smallest one.<\/p>\n\n\n\n<p><strong>Note:<\/strong>&nbsp;Other than the modal value (which will always be an integer), your answers should be in decimal form, rounded to a scale of&nbsp;<strong>1<\/strong>&nbsp;decimal place (i.e., <strong>12.3<\/strong>,&nbsp;<strong>7.0<\/strong>&nbsp;format).<\/p>\n\n\n\n<p><strong>Example<\/strong><\/p>\n\n\n\n<p><strong><em>N <\/em>= 6<\/strong><br><strong><em>X<\/em> = [1, 2, 3, 4, 5, 5<\/strong>]<br>The mean is&nbsp;<strong>20\/6 =<\/strong> <strong>3.3<\/strong>.<br>The median is <strong>3+4\/2<\/strong>&nbsp;<strong>3.5<\/strong>.<br>The mode is&nbsp;<strong>5<\/strong>&nbsp;because&nbsp;<strong>5<\/strong>&nbsp;occurs most frequently.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Input_Format\"><\/span><strong>Input Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The first line contains an integer,&nbsp;<strong><em>N<\/em><\/strong>, the number of elements in the array.<br>The second line contains&nbsp;<em><strong>N<\/strong><\/em>&nbsp;space-separated integers that describe the array&#8217;s elements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Constraints\"><\/span><strong>Constraints<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul><li><strong>10 &lt;= <em>N<\/em> &lt;= 2500<\/strong><\/li><li><strong>0 &lt; <em>x<\/em>[<em>i<\/em>] &lt;= 10<sup>5<\/sup><\/strong> ,where <strong><em>x<\/em>[<em>i<\/em>]<\/strong> is the <em><strong>i<sup>th<\/sup><\/strong><\/em> element of the array.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Output_Format\"><\/span><strong>Output Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Print&nbsp;<strong>3<\/strong>&nbsp;lines of output in the following order:<\/p>\n\n\n\n<ol><li>Print the&nbsp;<em>mean<\/em>&nbsp;on the first line to a scale of&nbsp;<strong>1<\/strong>&nbsp;decimal place (i.e.,&nbsp;<strong>12.3<\/strong>,&nbsp;<strong>7.0<\/strong>).<\/li><li>Print the&nbsp;<em>median<\/em>&nbsp;on a new line, to a scale of&nbsp;<strong>1<\/strong>&nbsp;decimal place (i.e.,&nbsp;<strong>12.3<\/strong>,&nbsp;<strong>7.0<\/strong>).<\/li><li>Print the&nbsp;<em>mode<\/em>&nbsp;on a new line. If more than one such value exists, print the numerically smallest one.<\/li><\/ol>\n\n\n\n<p><strong>Sample Input<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>10\n64630 11735 14216 99233 14470 4978 73429 38120 51135 67060<\/code><\/pre>\n\n\n\n<p><strong>Sample Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>43900.6\n44627.5\n4978<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Explanation\"><\/span><strong>Explanation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Mean:<\/strong><br>We sum all&nbsp;&nbsp;elements in the array, divide the sum by&nbsp;, and print our result on a new line.<strong> <em>U<\/em> = 439006 \/ 10 = 43900.6<\/strong><\/p>\n\n\n\n<p><strong>Median:<\/strong><br>To calculate the median, we need the elements of the array to be sorted in either non-increasing or non-decreasing order. The sorted array<strong><em>&nbsp;X<\/em> = {4978, 11735, 14216, 14470, 38120, 51135, 64630, 67060, 73429, 99233}<\/strong>. We then average the two middle elements:<strong> <em>median<\/em> = 89255\/2 = 44627.5<\/strong><\/p>\n\n\n\n<p><strong>Mode:<\/strong><br>We can find the number of occurrences of all the elements in the array:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>4978 : 1\n11735 : 1\n14216 : 1\n14470 : 1\n38120 : 1\n51135 : 1\n64630 : 1\n67060 : 1\n73429 : 1\n99233 : 1<\/code><\/pre>\n\n\n\n<p>Every number occurs once, making&nbsp;<strong>1<\/strong>&nbsp;the maximum number of occurrences for any number in&nbsp;<strong><em>X<\/em><\/strong>. Because we have multiple values to choose from, we want to select the smallest one,&nbsp;<strong>4978<\/strong>, and print it on a new line.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_%E2%80%93_Day_0_Mean_Median_and_Mode_Solution\"><\/span><strong>Solution &#8211; Day 0: Mean, Median, and Mode Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"C\"><\/span><strong>C++<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"cpp\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;cmath>\n#include &lt;cstdio>\n#include &lt;vector>\n#include &lt;iostream>\n#include &lt;algorithm>\nusing namespace std;\nconst int max_n = 1e5+5;\n\nint main() \n{\n    \/* Enter your code here. Read input from STDIN. Print output to STDOUT *\/ \n    \n    int n; cin>>n; int a[max_n]; long sum=0;\n    \n    for(auto i=0;i&lt;n;i++) \n    {\n        cin>>a[i];\n        sum+=a[i];\n    }\n    \n    double mean, median;\n    \n    mean = (double)sum\/n;\n    \n    sort(a,a+n);\n    if(n%2==0) \n        median = (double)(a[n\/2-1]+a[n\/2])\/2;\n    else \n        median = a[n\/2];\n    \n    int mode=a[0], mx=1, cnt=1;\n    for(auto i=0;i&lt;n-1;i++)\n    {\n        if(a[i]==a[i+1]) {\n            ++cnt;\n        }\n        else \n            cnt=1;\n        if(cnt>mx) \n        {\n            mx=cnt;\n            mode=a[i];\n        }\n    }\n    \n    cout&lt;&lt;mean&lt;&lt;\"\\n\"&lt;&lt;median&lt;&lt;\"\\n\"&lt;&lt;mode;\n    \n    return 0;\n}<\/pre>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-5246141430412355\"\n     data-ad-slot=\"8798433565\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Python\"><\/span><strong>Python<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># Enter your code here. Read input from STDIN. Print output to STDOUT\nimport numpy as np\nfrom scipy import stats\n\nsize = int(input())\nnumbers = list(map(int, input().split()))\nprint(np.mean(numbers))\nprint(np.median(numbers))\nprint(int(stats.mode(numbers)[0]))<\/pre>\n\n\n\n<p><strong>Disclaimer:<\/strong> The above Problem <strong>(<a href=\"https:\/\/www.hackerrank.com\/challenges\/s10-basic-statistics\/problem\" target=\"_blank\" rel=\"noreferrer noopener\">Day 0: Mean, Median, and Mode<\/a>) <\/strong>is generated by <strong>Hacker Rank<\/strong> but the Solution is Provided by <strong>CodingBroz<\/strong>. This tutorial is only for <strong>Educational<\/strong> and <strong>Learning<\/strong> Purpose.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hello coders, today we are going to solve Day 0: Mean, Median, and Mode HackerRank Solution which is a part of 10 Days of Statistics Series.<\/p>\n","protected":false},"author":1,"featured_media":2769,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[9,187],"tags":[18,188],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/06\/day-zero-mean-median-mode-statistics-solution-codingbroz.png","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/2766"}],"collection":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/comments?post=2766"}],"version-history":[{"count":3,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/2766\/revisions"}],"predecessor-version":[{"id":3426,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/2766\/revisions\/3426"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media\/2769"}],"wp:attachment":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media?parent=2766"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/categories?post=2766"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/tags?post=2766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}