Fast-Food Bills for Drive-Thru Customers A random sample of 49 cars in the drive-thru of a popular fast food restaurant [I revealed an average bill of $17.75 per car. The population standard deviation is $5.65. Estimate the mean bill for all cars [I D from the drive-thru with 94% condence. Round intermediate and final answers to two decimal places. _ @\"E Number of Jobs A sociologist found that in a sample of 55 retired men, the average number ofjobs they had during their lifetimes was 7.2. The population standard deviation is 2.3. (a) Find the best point estimate of the mean. The best point estimate of the mean is E]. The numbers of faculty at 20 randomly selected state-controlled colleges and universities with enrollment under 12,000 students are shown below. Use these data to estimate the mean number of faculty at all state-controlled colleges and universities with enrollment under 12,000 with 98% confidence. Assume o= 165.1. Assume the population is normally distributed. Round intermediate calculations steps to at least two decimal places. Round your final answers to one decimal place. 203 374 412 134 539 471 211 384 396 224 337 395 121 356 621 367 408 515 280 289 Send data to Excel M Length of Growing Seasons The growing seasons for a random sample of 37 US. cities were recorded, yielding a sample mean of 190.5 days and the population standard deviation of 55.5 days. Estimate the true population mean of the growing season with 99% condence. Round your answers to at least one decimal place. M 43 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 21.2 pounds. Assume that 6:2.5 pounds. What is the 95% condence interval for the true mean weight, [4, of all packages received by the parcel service? @204 to 22 pounds 0 20.3 to 22.1 pounds X \\(3 O 20.6 to 21.8 pounds 0 20.5 to 21.9 pounds