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Calculate the margin of error based on a 90% confidence interval. A. 4.54 B. 5.83 C. 6.95 D. 8.25Find a 90% confidence interval for the mean amount (in $). A. (46.75, 63.25] B. [48.05, 61.95] C. [49.17, 60.83] D. [50.46, 59.54)In an examination of purchasing patterns of shoppers, a sample of 23 shoppers revealed that they spent, on average, $55 per hour of shopping. Based on previous years, the population standard deviation is thought to be $17 per hour of shopping. Assume that the amount spent per hour of shopping is normally distributed