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Chapter 10: Two Sample Tests MULTIPLE CHOICE. Choose the …

Chapter 10: Two- Sample Tests MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) True or False: For all two- Sample Tests , the Sample sizes must be equal in the two groups. 1). A) True B) False 2) The t test for the di erence between the means of 2 independent populations assumes that the 2). respective A) populations are approximately normal. B) Sample sizes are equal. C) Sample variances are equal. D) All of the above. 3) True or False: When you test for differences between the means of two independent 3). populations, you can only use a two-tail test.

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. SCENARIO 10 -4 Two samples each of size 25 are taken from independent populations assumed to be normally distributed with equal variances. The rst sample has a mean of 35.5 and standard deviation of 3.0 while the second sample has a mean of 33.0

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