{"id":732,"date":"2021-09-16T02:39:00","date_gmt":"2021-09-16T02:39:00","guid":{"rendered":"https:\/\/es-andreabianchini.it\/andrewsblog\/?p=732"},"modified":"2021-09-16T04:03:26","modified_gmt":"2021-09-16T04:03:26","slug":"valore-atteso-e-varianza","status":"publish","type":"post","link":"https:\/\/es-andreabianchini.it\/andrewsblog\/?p=732","title":{"rendered":"Valore atteso, varianza e deviazione standard"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code># varianza.py\n#\n# questo programma calcola il valore medio, la varianza\n# e la deviazione standard di una lista di numeri\n# interi generati casualmente.\n#\n# by Andrea Bianchini (2021)\n#\n\n\nfrom random import randint\nimport math\n\nN = 20\nMIN = 0\nMAX = 1000\n\ns = &#91;randint(MIN,MAX) for _ in range(N)]\n\nprint(\"La lista generata \u00e8 la seguente :\")\nprint(s)\n\n# Calcolo valore medio\nvm=float(sum(s))\nvm=vm\/N\n\n# Calcolo varianza\nscarti = &#91;(sx-vm)*(sx-vm) for sx in s]\nvms = float(sum(scarti))\nvms = vms\/N\n\nprint()\nprint(\"Scarti quadratici lista originale : \")\nprint(scarti)\nprint()\nprint(\"Valore medio lista originale: %.2f\" %vm)\nprint()\nprint(\"Varianza lista originale: %.2f\" %vms)\nprint()\nprint(\"Deviazione standard lista originale: %.2f\" %(math.sqrt(vms)))\nprint()\nprint(\"Deviazione minima lista originale: %.2f \" %(math.sqrt(min(scarti))))\nprint()\nprint(\"Deviazione massima lista originale: %.2f \" %(math.sqrt(max(scarti))))<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Esempio:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>La lista generata \u00e8 la seguente :\n&#91;73, 801, 284, 79, 291, 425, 429, 265, 494, 330, 376, 521, 333, 162, 763, 202, 66, 462, 202, 366]\n\nScarti quadratici lista originale : \n&#91;74638.23999999999, 206843.04, 3868.839999999999, 71395.84, 3047.0399999999986, 6209.440000000001, 6855.840000000002, 6593.439999999998, 21844.840000000004, 262.43999999999966, 888.0400000000006, 30555.040000000005, 174.2399999999997, 33929.64, 173722.24000000002, 20793.639999999996, 78512.04, 13409.640000000003, 20793.639999999996, 392.0400000000005]\n\nValore medio lista originale: 346.20\n\nVarianza lista originale: 38736.46\n\nDeviazione standard lista originale: 196.82\n\nDeviazione minima lista originale: 13.20 \n\nDeviazione massima lista originale: 454.80 \n>>> <\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Esempio:<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,7],"tags":[],"class_list":["post-732","post","type-post","status-publish","format-standard","hentry","category-python","category-stem"],"_links":{"self":[{"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=\/wp\/v2\/posts\/732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=732"}],"version-history":[{"count":4,"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=\/wp\/v2\/posts\/732\/revisions"}],"predecessor-version":[{"id":738,"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=\/wp\/v2\/posts\/732\/revisions\/738"}],"wp:attachment":[{"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/es-andreabianchini.it\/andrewsblog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}