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1. The value of z score in a hypothesis test is affected by variety of factors. Supposing that all other variables are held constant, describe how the value of z is affected by each of the following:

a. Increasing the difference between sample mean and original population mean.

b. Increasing the population standard deviation.

c. Increasing the number of scores in sample.

2. If the alpha level is changed from a = 0.05 to a = 0.01

a. What takes place to the boundaries for critical region?

b. What happens to probability of type I error?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922505

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