# Res 342 Individual E-Text Week 4 Essay

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15.18 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?
Correct?                 Regular Cola             Diet Cola             Row Total
Yes, got it right           7                                   7                           14
No, got it wrong       12                                 20                           32
Col Total                   19                                 27                           46

ACTUAL EXPECTED
Credits Very Un Somewhat Very Total Credits Very Un Somewhat Very Total
0-9 12 8 3 23 0-9 7.546875 6.828125 8.625 23
10-59 8 4 10 22 10-59 7.21875 6.53125 8.25 22
60+ 1 7 11 19 60+ 6.234375 5.640625 7.125 19
Total 21 19 24 64 Total 21 19 24 64

CHITEST 0.005217

Because the probability is lower than alpha of 0.01, we can assert that there is a relationship between the two variables.

15.18 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?
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

Ho: certainty and credits earned are independent
Ha: certainty and credits earned are dependent
I ran...

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