A prominent university conducted a survey on the effect of part-time work on student grade point...

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A prominent university conducted a survey on the effect ofpart-time work on student grade point average (GPA). Let xbe the hours worked per week and y the GPA for the year. Asummary of the results is below. What can the university concludewith an ? of 0.05?
n = 21
sigmay = 55
,sigma x = 520
sigmay² = 171
, aigmax² = 15288
sigmayx = 1275
, sigma ( y ? ?2)  = 24
a) Compute the quantities below.
_Bhat0 =  , Bhat =
What GPA is predicted when a students works 9 hours a week?
b) Compute the appropriate test statistic(s)for H₁: ? < 0.
Critical value =  ; Test statistic =
Decision:
---Select---
Reject H0
Fail to reject H0
c) Compute the corresponding effect size(s) andindicate magnitude(s).
If not appropriate, input and/or select "na" below.
Effect size =  ;
---Select---
na
trivial effect
small effect
medium effect
large effect
d) Make an interpretation based on theresults.
More hours of part-time work significantly predicts a higherGPA.
More hours of part-time work significantly predicts a lowerGPA.
Part-time work does not significantly predict GPA.

Answer & Explanation Solved by verified expert

3.8 Ratings (480 Votes)

x 520 y 55 xy 1275 x 15288 y 171 Sample size n 21 x xn 52021 247619048 y yn 5521 261904762 SSxx x xn 15288 52021 241180952 SSyy y yn 171 5521 See Answer

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