I need solve this assignment of MTH-213

QUESTION 10 3 points Save Answer QUESTION 12 3 points Save Answer A journal article reports that a The waiting time (in minutes) of random sample of 22 antivirus customers at a fast food outlet is software packages was used as a normally distributed. A random basis for calculating a 97% t-based sample of 15 customers is selected confidence interval for the true mean and the 99% confidence interval for the population mean waiting time is annual cost of an antivirus software obtained as (1.83,2.58). Find the in UAE. The resulting interval was standard deviation used to construct (182 Dhs, 293 Dhs). What is the the 99% confidence interval. Round sample mean cost used when your answer to three decimal places. computing the interval? Round your answer to two decimal places. QUESTION 13 3 points Save Answer Which of the following would produce QUESTION 11 4 points Save Answer the widest confidence interval for u? A researcher wants to calculate a 90% confidence interval with n = 75. 95% confidence interval for the unknown true proportion of defective O 89% confidence interval with n = 75. resistors off an assembly line. He takes a random sample of 332 O 89% confidence interval with n = 100 resistors, and finds that 35 of them are defective. Find the margin of error O 90% confidence interval with n = to construct the 95% confidence 100 interval? Round your answer to four QUESTION 15 3 points Save Answer decimal places. A random sample of 50 light bulbs had a mean lifetime of 590 hours. A QUESTION 14 97% confidence interval for the 3 points Save Answer population mean was (575,605). What is the relationship between Which one of the following sample size and the standard error of statements is the correct interpretation of the results? the sample mean? O Of all the bulbs 97% of the light O The standard error increases as bulbs in the sample had lifetimes the sample size increases between 575 hours and 605 hours O The standard error decreases as O None of these are true. the sample size decreases. O We are 97% confident the true O The standard error decreases as mean lifetime is between 575 the sample size increases. hours and 605 hours O The standard error is unaffected O The confidence interval (575,605) contains the true mean lifetime by the sample size. with a probability of 97%