Question

College students were randomly sorted into one of two groups. Members of each group performed a series of mental tasks while music was playing in the background. One group listened to pop music and the other to country music. It is hypothesized that music will effect the number of tasks completed. What can be concluded with an α of 0.10? The results are below:

pop	country
1 = 39.31 1 = 5.43 n1 = 10	2 = 44.15 2 = 3.2 n2 = 12

b)
Condition 1: (choose one)
1) pop music 2) school 3) country music 4) mental task 5)music
Condition 2:
1) pop music 2) school 3) country music 4) mental task 5)music

c) Obtain/compute the appropriate values to make a decision about H₀.
(Hint: Make sure to write down the null and alternative hypotheses to help solve the problem.)
critical value =____________ ; test statistic = ________________
Decision:  ---Select--- Reject H0 Fail to reject H0

d) If appropriate, compute the CI. If not appropriate, input "na" for both spaces below.
[ ________, ___________ ]

e) Compute the corresponding effect size(s) and indicate magnitude(s).
If not appropriate, input and/or select "na" below.
d = _____________ ;  (choose one) 1) na 2) trivial effect 3) small effect 4) medium effect 5) large effect
r² = ____________ ;  (choose one) 1) na 2) trivial effect 3) small effect 4) medium effect 5) large effect

f) Make an interpretation based on the results.

1) Students that listened to pop music significantly completed more tasks.

2) Students that listened to country music significantly completed more tasks.    

3) Music had no significant effect on the number of tasks completed.

Answer 1

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