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Question

Heading 1 Heading 2 m .:(, | :-.g-B' | 11 Normal!!NoSpaci Styles Paragraph rue False In a statistics class, 8 students took their pulses before and after being frightened The frightening event was having the teacher scream and run from one side of the room to the other. The pulse rates (beats per minute) of the students before and after the scream were obtained separately and are shown in the table. Treat this as though it were a random sample of community college students. Test the hypothesis that the mean of college students' pulse rates is higher after a fright using a significance level of 005. Do the 5-step hypothesis test and submit an image of your work. Participant # Pulse Before 93 $6 70 73 83 92 83 62 87 Pulse After 10273 74 7 98 83 71

Explanation / Answer

step 1:

ho: there is no significant difference in the means of before and after

h1: the means of after is more than before

step 2:

alpha= 5%

step 3:

t= mean_diff/(sd_diff/sqrt(n))

mean_diff -4.125

sd_diff 3.563204817

n= 8

t= -3.274373068

step 4:

p-value=

P(T>t)

1-P(T<t)

=T.DIST.RT(-3.27437,7)

0.993203924

step 5:

with t=-3.27437, p>0.05, I fail to reject ho and conclude that there is no significant difference in the means of before and after

before after diff 93 102 -9 86 87 -1 70 73 -3 73 74 -1 83 87 -4 92 98 -6 83 83 0 62 71 -9

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