Question 179875This question is from textbook
: Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question: At α = .01, is the degree of certainty independent of credits earned? Certainty
Credits Earned Very Uncertain Somewhat Certain Very Certain Row Total
0–9 12 8 3 23
10–59 8 4 10 22
60 or more 1 7 11 19
Col Total 21 19 24 64
This question is from textbook
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question: At α = .01, is the degree of certainty independent of credits earned? Certainty
Credits Earned Very Uncertain Somewhat Certain Very Certain Row Total
0–9................ 12................ 8.......... 3.......... 23
10–59............... 8................ 4.......... 10......... 22
60 or more.......... 1................ 7.......... 11......... 19
Col Total.......... 21............... 19.......... 24......... 64
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Ho: Row and column factors are independent (not related)
Ha: they are dependent
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Run a Chi-Square test on the 3x3 data set to get:
Test Statistic: Chi-Sq. = 14.764
p-value: 0.00522
df= (3-1)(3-1) = 4
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Conclusion: Since the p-value is less than 1%, Reject Ho
The row and column factors are statistically related (dependent).
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Cheers,
Stan H.
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