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Date Submitted: 09/30/2010 07:57 PM
* Individual Assignment: E-Text
Res/342
August 07, 2010
* Chapter Exercises 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
Chi= 14.76 p-value= .0052 degree of freedom=4 chi squared at .01 =13.28
H0: There is no difference between credits earned and certainty
H1: There is a difference between credits earned and certanty
Not independant
Conclusion: Since p-value is greater that alpha = 1%, Fail to reject Ho.
The test provides statistical evidence that degree of certainty and credits earned are independent.
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* Chapter Exercises 15.32
*
Prof. Green’s multiple-choice exam had 50 questions with the distribution of correct answers shown below. Research question: At α = .05, can you reject the hypothesis that Green’s exam answers came from a uniform population?
*
* Correct Answer Frequency
*
* A 8
* B 8
* C 9
* D 11
* E 14
* TOTAL 50...