please answer 12-13-14

an IDH X a IDHS: Wc M 20 jgd) PDF) 512 X M Inbox (1) Bb *A data COXMod Course H Course H Course H Course H Homewo + X File | C:/Users/USER/Downloads/512%20test%20(1).pdf to G 53 5 of 17 Q + Page view A Read aloud | Draw Highlight v Erase D. 180.975 +95.836 12. Suppose the scores on an examination are normally distributed with a mean of 50 and a standard deviation of 10. If repeated samples of size n=25 is taken from the scores, what is the standard deviation of the distribution of the sample mean A) 10 B) 4 C) 0.4 D) 2 13. A marketing research company needs to estimate the average total compensation of CEOs in the service industry. Data were randomly collected from 18 CEOs and the 90% confidence interval was calculated to be ($2,181,260, $5,836,180). Explain what the phrase "90% confident" means. A. 90% of the similarly constructed intervals would contain the value of the sample mean. B. In repeated sampling, 90% of the intervals constructed would contain population mean. C. The probability that the population mean falls in any confidence interval constructed is .90. D. 90% of the population values will fall in the interval. 14. A study was designed to compare the variability of male and female salaries. The null hypothesis was that the population standard deviations were equal vs. the alternative that they were not equal. State the F-statistic if the following sample results were observed. Males: n = 25. s = 9.9 and Females: n = 25, s = 8.7 A. 1.14 B. 1.20 C. 1.29 D. 1.44 15. A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful if the average time spent on the deliveries does not exceed 33 minutes. The owner has randomly selected customers and has delivered pizzas to their homes. The owner of the store views the delivery possibility as a method of expanding her business. She is concerned with the possibility of incorrectly concluding that the mean delivery time exceeds 33 minutes, when, in fact, the mean really equals 33 minutes. In terms of our errors, she is concerned with making error. Type here to search M W 56OF ENG 11:41 PM 10/19/2021 24