Introductory Statistics I
Introductory Statistics I STAT 250
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This 7 page Class Notes was uploaded by Mr. Jaycee Schmidt on Monday September 28, 2015. The Class Notes belongs to STAT 250 at George Mason University taught by Susan Surina in Fall. Since its upload, it has received 15 views. For similar materials see /class/215210/stat-250-george-mason-university in Statistics at George Mason University.
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Date Created: 09/28/15
MINITAB Assignment 2 a if 5212um 11415 iiiii Melamine m l hnlcab ptESs n is help 1om201o 50 PM Melamine ca Mlnlcab ptESs n is help Recnevlng Ptajec mm ms PsrHuxmDuv EmssmsTAT zsmmmm ssmmmsmmms 2mmmsizimmngxm msmbmmn m m Arvan ssma Rap7mm in Current Pnpulatmn Survey 2m Percemage a Respnndenls m s m m 4 m m wm mack Assn Race of Rapondents Percent wumn an data Edama kabmn MAI mm 55143 Rawndgms m omen Pnpuhlmn Sum 1003 Persem av nespandems 4U 44 as Age in Vears w The classwldth forthe hlstogram ls 10 v The class lucludmg ages 44 to 45 technlcally 47 years and 354 days has the l Calculations forquotlncomequot van able Mean 49440 Std Devlanon 52924 Medlan 37301 lQR 35000 u Calculanans for quotAge yarrable Mean 43 0 years Std Devranon 10 2 years Medran 43 years R l years persem a Respundenls u The shape ofthe distribution 15 shghtlyskewed tothe le 111 Mean 45 years Std Deviation lt2 3 years Medran 45 years um 14years wSE E psrsem av Raspandenls 4 The shape ofthe dxsmbunan has a small skewtathe left 7 years IQ years than the mean and standard deviation measures h s same Percent av nespandems s 40 44 49 Age nvears The shape of the distribution is skewed to the left Mean 429 years Std Deviation 103 years Median 43 years IQR 16 years Because of the distribution s skew to the left the best measure of center would be the median and the IQR as they are more resistant to the skew than the mean and standard deviation measures i The random sample of 10000 respondents best represents the entire group of 65418 respondents Not only are the shapes of the distributions very similar the medians and IQRs for both are exactly the same In addition the means and standard deviations for the two distributions are very close to being the same as well 4444 6212010 12017 PM Welcome to Minitab press F1 for help 1092010 104755 AM Welcome to Minitab press F1 for help Retrieving project from file 39PSFHOMEDOCUMENTSGMUSTAT 250MINITAB ASSIGNMENTSMINITAB 2MlNTAB727PROBLEM 2MPJ39 b Variable N N L Mean SE Mean StDev Minimum Q1 Median Manufacturer A 40 0 17076 0134 0847 15240 16535 17090 Manufacturer B 40 0 15123 0132 0834 14090 14643 14895 Manufacturer C 40 0 17148 00320 0203 16730 17015 17145 Manufacturer D 40 0 18861 00134 00845 18660 18810 18865 Variable Q3 Maximum Manufacturer A 17825 18610 Manufacturer B 15363 17840 Manufacturer C 17337 17480 Manufacturer D 18928 19020
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