Gross sales receipts (in thousands of dollars) are recorded daily for a sample of 20 small businesses in the New York metropolit
an area for a one-day period in March. The mean of the sample is 283.2 and the standard deviation of the sample is 118. The sample results are as follows. 521.0 299.6 430.0 325.0 170.5 248.6 125.5 91.2 353.3 268.6 359.7 207.7 392.1 336.3 467.0 300.3 150.6 139.1 263.6 214.3 a company is considered to be "successful" if its daily sales exceed $200,000. Based on the above sample, what is the point estimate of the true percentage(same as True Population) of companies that are successful?
