Question

A national chain of health dubs claims thet the meah weight loss of na Sanuary ios ot least5 pounds.A researcher lintervievned a sandom Sampe of ds members of the chub toun that their averoge weiant loss Has 4.5 pounols, with a samiple stanohol dleviation of pounde. Assume porent populatan is normal. A 0.05 sianiicance level, is the eolth cluto's claim correet ? members du m Corree

Answer 1

null hypothesis: Alternate Hypothesis for 0.05 level with left tailed test and n-1-24 degree of freedom, critical value of t Decision rule: reject Ho if test statistic t<-1.711 population mean sample mean sample size sample std deviation μ: X- 4.50 1.80 standard errror of me-s/Vn- 0.360 test statistic t

as test statistic is not in critical region we can not reject null hypothesis

we do not have evidence to reject health club claim