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5. The following information is obtained from two independent samples selected from two populations. n1 =650x1 =1.051 =5.22 n2 =675x2 =1.542 =6.80 Question Answer a.

5. The following information is obtained from two independent samples selected from two populations.

n1 =650x1 =1.051 =5.22

n2 =675x2 =1.542 =6.80

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Answer

a. Which one characteristic of the data did you use to make your selection of the z/normal (not the t) distribution: sample sizes or means or standard deviations?

b. What is the value of z? Round to two decimal places.

c. Would you reject the null hypothesis? YES or NO

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