Question

Countdown: Days:-o Time:-09:42:31 II uiere is a teaunent enect, ue sampie SIze was LOU SIIa LU uetect IL D. C. O She should reject the null hypothesis. D. O There is evidence of a small effect on memory by her experimental treatment. Question 11 A group of 43 college students from a certain liberal arts college were randomly sampled and asked about the number of aleoholic drinks they have 10 points in a typical week. The purpose of this study was to compare the drinking habits of the students at the college to the drinking habits of college students in general. In particular, the dean of students, who initiated this study, would like to check whether the mean number of alcoholic drinks that students at his college in a typical week differs from the mean of U.S. college students in general, which is estimated to be 4.73 Type numbers in the boxes. the study reported an average of 5.52 drinks per with a standard The group of 43 students in deviation of 3.64 drinks. Find the p-value for the hypothesis test. The p-value should be rounded to 4-decimal places. Question 12 Type numbers in the boxes. Commute times in the U.S. are heavily skewed to the right. We select a of 60 people from the 2000 U.S. Census who reported a non- 10 points

Answer 1

Q 11 ) Here null hypothesis Ho :  $\mu$ = 4.73

Ha : $\mu$ $\neq$ 4.73

n = 43 , x bar = 5.52 , s = 3.64

d.f = n -1 = 42

test statistic

t = xbar - $\mu$ / (s/$\sqrt$n)

t = (5.52 - 4.73)/(3.64/$\sqrt$43)

t = 1.42

p -value = 2* P( t > 1.42) d.f = 42

p-value = 0.1630

Q - 16)

Given Ho : $\mu$ = 14

H1 : $\mu$ > 14

n = 41 , xbar = 15.4 , s = 5.8

test statistic t = (15.4 -14 )/ (5.8/$\sqrt$41)

t = 1.55

p-value = P( t > 1.55 ) d.f = 40

p -value = 0.0645