1.)Given the following hypothesis; : The null hypothesis is Ho : = 5 The alternative is H1 : 5 The mean of a sample of 17 is 7 The population standard deviation is 2 What is the Z-statistics?

2.)An analyst is testing to see if the mean of a population is less than 133. A random sample of 50 observations had a mean of 130. Assume a standard deviation of 5. What is the test statistic?

3.)From a population of 5000 observations a sample of 100 is selected. Calculate the standard error of the sample mean if the population standard deviation is 50.