Question: The following are sampling distributions for difference estimation from two different populations. Both distributions have the same shape, and the horizontal and vertical axes have

The following are sampling distributions for difference estimation from two different populations. Both distributions have the same shape, and the horizontal and vertical axes have the same values and scales.

Required:

a. Which of the distributions has the larger mean ?

b. Which of the distributions has the larger standard deviation?

c. Assume the mean for distribution 1 is 87. Determine the approximate standard deviation for distribution 1 and complete the horizontal scale using 15 scale points on the axis.

d. Determine the approximate population mean and standard deviation for population 2. Assume that the left point of the distribution intersects the horizontal axis at scale point 5.

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