The following data are the incomes of 30 marketing executives for U.S corporations in thousands of dollars. Using 6 classes draw a frequency distribution table of these data and determine the probability that the income uf executives from US corporations is more than $61,000. 58 64

79

79

74

71 40 76 76 74 38 54 50 89 34 56 69 31 74 45 65

71 79 69 61 67 45 85 61 62 69

Using the above raw data, calculate the sample mean and standard deviation and estimate the mean income of the entire marketing executives in US, using a 95% confidence interval