The mean of a population is 76 and the standard deviation is 12. The shape of the population is unknown. Determine the probability of each of the following occurring from this population. Appendix A Statistical Tables a. A random sample of size 33 yielding a sample mean of 79 or more b. A random sample of size 140 yielding a sample mean of between 74 and 78 c. A random sample of size 218 yielding a sample mean of less than 76.7 (Round all the values of z to 2 decimal places, e.g. 15.25 and final answers to 4 decimal places, e.g. 0.2513.) a. C. b.

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