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6) Find the z-score that has 2.68% of the distribution's area to its right. 8) A population has a mean of 80 and a standard

6) Find the z-score that has 2.68% of the distribution's area to its right.

8) A population has a mean of 80 and a standard deviation of 12. Samples of size 36 are selected from the population. Describe the sampling distribution of the sample mean.

9) American children watch an average of 25 hours of television per week with a standard deviation of 8 hours. A random sample of 40 children is selected.What is the probability the mean number of hours of television they watch per week is less than 22?

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