A random sample of six teenage males is taken from Phoenix. Another random sampl

Question

A random sample of six teenage males is taken from Phoenix. Another random sample of six teenage males is taken from Chicago. Using school records, you measure the number of violent acts they have committed in school during the last year. You hypothesize that the boys in Phoenix committed fewer acts of violence than the boys in Chicago.  The Phoenix data are listed in Group 1 and the Chicago data are listed in Group 2 (hypothetical, of course). Please use the table to complete questions 4, 5, 6, 7, and 8.

What is the value of the numerator?

-.67

34.56

6.78

8.90

Group 1 Group 2 Phoenix Males Chicago Males 4.00 5.00 5.00 5.00 6.00 6.00 6.00 5.00 5.00 7.00 6.00 8.00

Explanation / Answer

Solution:

Ho:mean(phoenix_males)=mean(chaicago_males)

H1:mean(phoenix_males)<mean(chaicago_males)

Alpha=0..05

Rcode:

phoenix_males <- c(4,5,6,6,5,6)
chicago_males <- c(5,5,6,5,7,8)
t.test(phoenix_males,chicago_males,alternative = "less")
mean(phoenix_males)
mean(chicago_males)

ANSWER:

5.333333-6

=-0.666667

-.67

OPTIONA

a.

-.67

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