Use the given information to find the minimum sample size required to estimate an unknown population mean μ. How many adults must be randomly selected to estimate the mean FICO (credit rating) score of working adults in a country? We want 90% confidence that the sample mean is within 3 points of the population mean, and the population standard deviation is 65. The minimum sample size required is adults. (Round up to the nearest whole number.)
Image text
Use the given information to find the minimum sample size required to estimate an unknown population mean μ. How many adults must be randomly selected to estimate the mean FICO (credit rating) score of working adults in a country? We want 90% confidence that the sample mean is within 3 points of the population mean, and the population standard deviation is 65. The minimum sample size required is adults. (Round up to the nearest whole number.)
