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Question 21 Question text The following table shows the Myers-Briggs personality preferences for a random sample...

Question 21

Question text

The following table shows the Myers-Briggs personality preferences for a random sample of 406 people in the listed professions.

Occupation Extroverted Introverted Row Total
Clergy (all denominations) 62 42 104
M.D. 70 95 165
Lawyer 56 81 137
Column Total 188 218 406

Use the chi-square test to determine if the listed occupations and personality preferences are independent at the 0.05 level of significance. Given P-Value < 0.005, will you reject or fail to reject the null hypothesis of independence?

Select one:

a. Since the P-value is less than α, we reject the null hypothesis that the Myers-Briggs personality preference and profession are independent. At 0.05 level of significance, we conclude that the Myers-Briggs personality preference and profession are not independent.

b. Since the P-value is greater than α, we fail to reject the null hypothesis that the Myers-Briggs personality preference and profession are not independent. At 0.05 level of significance, we conclude that the Myers-Briggs personality preference and profession are independent.

c. Since the P-value is greater than α, we reject the null hypothesis that the Myers-Briggs personality preference and profession are independent. At 0.05 level of significance, we conclude that the Myers-Briggs personality preference and profession are not independent.

d. Since the P-value is greater than α, we reject the null hypothesis that the Myers-Briggs personality preference and profession are not independent. At 0.05 level of significance, we conclude that the Myers-Briggs personality preference and profession are independent.

e. Since the P-value is less than α, we reject the null hypothesis that the Myers-Briggs personality preference and profession are not independent. At 0.05 level of significance, we conclude that the Myers-Briggs personality preference and profession are independent.

Question 25

Question text

The following table shows the Myers-Briggs personality preferences for a random sample of 409 people in the listed professions.

Occupation Extroverted Introverted Row Total
Clergy (all denominations) 65 43 108
M.D. 69 95 164
Lawyer 57 80 137
Column Total 191 218 409

Use the chi-square test to determine if the listed occupations and personality preferences are independent at the 0.10 level of significance. Depending on the P-value, will you reject or fail to reject the null hypothesis of independence?

Select one:

a. Since the P-value is greater than α, we fail to reject the null hypothesis that the Myers-Briggs personality preference and profession are independent. At 0.10 level of significance, we conclude that the Myers-Briggs personality preference and profession are not independent.

b. Since the P-value is greater than α, we reject the null hypothesis that the Myers-Briggs personality preference and profession are not independent. At 0.10 level of significance, we conclude that the Myers-Briggs personality preference and profession are independent.

c. Since the P-value is greater than α, we fail to reject the null hypothesis that the Myers-Briggs personality preference and profession are not independent. At 0.10 level of significance, we conclude that the Myers-Briggs personality preference and profession are independent.

d. Since the P-value is less than α, we reject the null hypothesis that the Myers-Briggs personality preference and profession are independent. At 0.10 level of significance, we conclude that the Myers-Briggs personality preference and profession are not independent.

e. Since the P-value is less than α, we fail to reject the null hypothesis that the Myers-Briggs personality preference and profession are independent. At 0.10 level of significance, we conclude that the Myers-Briggs personality preference and profession are not independent.

Homework Answers

Answer #1

Question 21

Answer : Option ( a )

Since the P-value is less than α, we reject the null hypothesis that the Myers-Briggs personality preference and profession are independent. At 0.05 level of significance, we conclude that the Myers-Briggs personality preference and profession are not independent.

Question 25

Answer : Option ( d )

Since the P-value is less than α, we reject the null hypothesis that the Myers-Briggs personality preference and profession are independent. At 0.10 level of significance, we conclude that the Myers-Briggs personality preference and profession are not independent

Explanation

Column 1 Column 2 Total
Row 1 65 43 108
Row 2 69 95 164
Row 3 57 80 137
Total 191 218 409
Expected Values Column 1 Column 2 Total
Row 1 191*108/409 = 50.435 218*108/409 = 57.565 108
Row 2 191*164/409 = 76.587 218*164/409 = 87.413 164
Row 3 191*137/409 = 63.978 218*137/409 = 73.022 137
Total 191 218 409

P value :

with chi score = 10.729 , d f = 2

we get p value = .00468.

Decision

p value < L.o.s

i.e 0 00468. < 0.10

so reject H0

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