The following salaries (in pesos) were obtained from a sample of 12 executive secretaries: 7,500 13,000 10,300 10,600 7,600 7,500 8,350 8,400 5,800 6,300 9,200 9,466 (a) Find the point estimate for the mean and standard deviation of the salaries of all the executive secretaries (b.) What is the proportion of executive secretaries with salaries above Php. 9,000.00?

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