2. the following is a sample of unemployment rates (in percentage points) in the us sampled from the period 1990-2004. 4.2, 4.7, 5.4, 5.8, 4.9 compute the sample mean, x and standard deviation, s using the formula method. (round your answers to one decimal place). [note: you can only use the calculator method to check your answer]. 23. using question 22, find the following: a. in what range does the empirical rule predict that approximately 95% of the unemployment rates will fall? b. what is the actual percentage of the employment rates fall in the range predicted in part (a) c. which gives the more accurate prediction of the percentage in part (b), chebyshev’s rule or the empirical rule? [give reason(s)]