4 TB MC Qu. 3-57 (Static) In an examination of holiday spending... In an examination of holiday spending [known to be normally distributed} of a sample of 16 holiday shoppers at a local mall, an average of $54 was spent per hour of 5 shopping. Based on the current sample, the standard deviation is equal to $21. Find a points 90% confidence interval for the population mean level of spending per hour. it! Pr'm Multiple Choice FF- References 0 [$44.83, $63.13] [$44.73, $63.26] [$45.36. $62.63] 0 O 0 [$4636. $61.04] Exam 1 Data Analytics (One atte.. i Saved Help Save & Exit Submit 5 TB MC Qu. 8-75 (Static) A sample of 1,400 American households... A sample of 1,400 American households was asked if they planned to buy a new car next year. Of the respondents, 34% indicated they planned to buy a new car next year. 5 Construct a 98% confidence interval of the proportion of American households who points expect to buy a new car next year. Print Multiple Choice References O [0.3074, 0.3726] [0.3105, 0.3695] O [0.3140, 0.3660] O [0.3392, 0.3408]TB MC Qu. 8-31 (Static) In an examination of purchasing patterns... In an examination of purchasing patterns of shoppers, a sample of 16 shoppers revealed that they spent, on average, $54 per hour of shopping. Based on previous 5 years, the population standard deviation is thought to be $21 per hour of shopping. points Assuming that the amount spent per hour of shopping is normally distributed, find a 90% confidence interval for the mean amount. Print Multiple Choice References [$45.36, $62.64] O [$47.27, $60.73] O [$51.84, $56.16] O [$52.32, $55.68]