Question

A fast-food chain claims that their “HUGE” size drink contains 36.3counces on average. A customer wants to test that the “HUGE” size drink contains less amount of drink. A random sample of 50 “HUGE” size cups is taken. The average weight of the drink from the sample is 35.8 ounces with a standard deviation of 0.78 ounces. Conduct the hypothesis test at 10% significance level.

Answer 1

given data are:-

sampel mean () = 35.8

sample sd(s)= 0.78

sample size (n) = 50

hypothesis:-

test statistic be:-

df = (n-1) = (50-1) = 49

p value :-

[ in any blank cell of excel type =T.DIST(-4.533,49,TRUE)]

decision:-

p value = 0.0000 <0.10 (alpha)

so, we reject the null hypothesis.

conclusion:-

there is sufficient evidence to support the claim that the drink contains less amount of drink at 10% level of significance.

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