1)The average number of calories from a fast food meal for adults in the US is 842...
Question:
1)The average number of calories from a fast food meal for adults in the US is 842 calories. A nutritionistbelieves that the average is less than reported. They sampled32meals that adults ordered andfound the sample mean to be 832 calories with a standard deviation of 49 calories.
What are the null and alternative hypotheses?
2)Boys of a certain age have a mean weight of 85 pounds. A complaint is made that in a municipal children's home the boys are underfed. As one bit of evidence, a random sample of30of these boys are weighed.Use the data below and a significance level of 0.05to determine if the complaint is legitimate.
Weights(Lbs)
90 85 70
69 84 83
76 92 98
69 106 82
89 80 93
84 73 71
80 74 89
71 93 92
94 74 72
74 90 86
Ho:Please notice that the parameter is already in the hypothesis statements.
HA:
t-stat =Please round to 2 decimal places.
p-value =Do not round.
Decision:Type eitherRetain HoorReject Ho
3)Write a summary statement for the hypothesis test above.
4)Candidate Twants to determine if there is a difference in his popularity between men and women.To test the claim of this difference, he conducts a survey of voters.The sample contains 375men and 350 women, of which 155 men and 123 of the women favor his candidacy.Do these values indicate a significant difference in popularity?Use a 0.05significance level.
What are the hypothesis statements?
5)Candidate Twants to determine if there is a difference in his popularity between men and women.To test the claim of this difference, he conducts a survey of voters.The sample contains 450 men and 475 women, of which 180 men and 160 of the women favor his candidacy.Do these values indicate a significant difference in popularity?Use a 0.05significance level.
z-stat =Round to 2 decimal places.
p-value =Do not round.
Decision:Type eitherRetain HoorReject Ho
6)Which is the correct summary statement for the hypothesis test above?
a)The sample data shows that the candidate's popularity is above33%.
b)The sample data shows that there is a difference in the candidate's popularity among men and women.
c)The sample data shows that there is no difference in thecandidate's popularity.
d)The sample data shows that the candidate's popularity is higher among men than women.
Expert Answer:
