A job satisfaction survey is to be administered to a random…

A jоb sаtisfаctiоn survey is tо be аdministered to a random sample of high school teachers in a certain region of the country. Researchers will use the results of the survey to compute an overall job satisfaction score for each teacher in the sample. Suppose it is known that the standard deviation of the overall job satisfaction scores is 7.5 points. The researchers want to compute the minimum sample size needed in order to estimate the mean overall job satisfaction score with an error of no more than 2 points and with 98% confidence. What z-score should be used for 98% confidence? [z] What minimum sample size is needed in order to obtain the desired accuracy of the estimate for the mean overall job satisfaction score? [n]