Question

the mean weight of all 20 year old women is 128 pounds. a random sample of 40 vegetarian 20 year old women resulted in a sample mean of 122 pounds and standard deviation of 15 pounds. do vegetarian 20 year old women weigh significantly less than 20 year women in general?

a). set up hypothesis for test
b.)calculate 99% confidence interval for population mean weight of all 20 year old vegetarian women. what test could you use to solve this
c) will we reject null according to interval?

Answer 1

Hery We have Sample gize (n) - 40 sample mean X 122 Standand devi'ahon (o)1 () Step! Hyp0 thegis 2 8 H Ha 12 8 claim) mis is o left laled tes (b) At 99 Contidinu intenva -0.99 : 0-01 0.005 Sinu gtandand diviahon is knohn and 30, 80, 2 dsn buhon INill be Ba mple iRe us ed

7cuitcal 2.576 99yContidina intenva f ppulahon mean 15 2122 .576 40 122 t 6.1og 28.1095 115 8905 128. 110 Round bo3 decmai pla cA 5 89 C) Stnu, 128 lue in th Cal Culased Confidnc inknval g0, Lse al bo nye h nul Hg po thugi Ho)
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