MInbox (1,173) x + Question 2 Part 3 of 3 Attempts Remaining: 2 Submit Answer Among various ethnic groups, the standard deviation of heights is known to be approximately 2.8 inches. We wish to construct a confidence interval for the mean height of a male Swedes. Forty eight male Swedes are surveyed. The sample mean is 70 inches. What will happen to the confidence interval obtained if 250 male Swedes are surveyed instead of 48? There will be no change to the confidence interval. The width of the confidence interval will increase. The width of the confidence interval will decrease. Not enough information to determine. Show all X pport_PPT19_CS....jpg ENG 1:04 PM US 2022-10-27 HOLDBA Wguard.me EduRITA - Ass X (22 unread) - x Home - myUF x Blackboard LE X Cengage Lear x M Inbox (1,173) x + V X Assignment?id=9815901116 Question 6 Part 1 of 4 Attempts Remaining: 2 Submit Answer Twenty Americans were surveyed to determined the number of hours they spend watching television each month. It was revealed that they watched an average of 168 hours each month with a standard deviation of 30 hours. Assume that the underlying population distribution is normal. What distribution should you use to construct a 95% confidence interval for the mean number of hours that American's spend watching television each month? O taf=19 O taf=20 O N(168, 6.708) O N(168, 30) Show all X Support_PPT19_CS..jpg ENG 1:04 PM US 2022-10-27EduRITA - Ass X (22 unread) - x Home - myUF x Blackboard Le X Cengage Lea x M Inbox (1,173) x ssignment?id=9815901116 + Submit Answer A pharmaceutical company makes tranquilizers. It is assumed that the distribution for the length of time they last is approximately normal. Researchers in a hospital used the drug on a random sample of 9 patients. The effective period of the tranquilizer for each patient, in hours, was as follows: Hours 2.7 2.8 3.0 2.3 2.3 2.2 2.8 2.2 2.4 What is the margin of error for a 98% confidence interval for the mean length of time that the tranquilizer is effective? 0.293 O 0.247 O 0.235 0.207 Show all X Support_PPT19_CS..jpg ~ OR ENG 1:05 PM W US 2022-10-27EduRITA - Ass X (22 unread) - x Home - myUF X Blackboard Le X Cengage Lea X M Inbox (1,173) x + V ment?id=9815901116 Question 4 Part 3 of 3 Attempts Remaining: 2 Submit Answer Assume that the population distribution of a brand of candy bag weights is normal with the standard deviation of 0.1 ounce. A sample of 16 bags of the same brand of candies was selected. Then the weight of each bag was recorded and the average weight was found to be two ounces. Explain and interpret the differences in the confidence intervals: "Increasing the confidence level from 90% to 98% creates a (widerarrower/equal) confidence interval because you are (rejecting/accepting) a larger area under the normal distribution of the mean weight of the bags of candies. Show all X Support_PPT 19_CS...jpg ENG 1:04 PM US 2022-10-27 OLDO / Wguard.me EduRITA - Ass X (22 unread) - X H Home - myUF x Blackboard Le X Cengage Lea X Mi Inbox (1,173) x + V X ment?id=9815901116 Attempts Remaining: 2 Submit Answer A pharmaceutical company makes tranquilizers. It is assumed that the distribution for the length of time they last is approximately normal. Researchers in a hospital used the drug on a random sample of 9 patients. The effective period of the tranquilizer for each patient, in hours, was as follows: Hours 2.7 2.8 3.0 2.3 2.3 2.2 2.8 2.2 2.4 What distribution would you use to construct a 98% confidence interval for the population mean length of time? Ots hot O N(2.52, 0.101) O N(2.52, 0.303) Show all X 1:05 PM Support_PPT19_CS....jpg ENG 2022-10-27 US W?id=9815901116 my x Blackboard Le X Cengage Lear X M Inbox (1,173) x + uestion 2 Part 2 of 3 ? Attempts Remaining: 2 Submit Answer Among various ethnic groups, the standard deviation of heights is known to be approximately 2.8 inches. We wish to construct a confidence interval for the mean height of a male Swedes. Forty eight male Swedes are surveyed. The sample mean is 70 inches. Construct and interpret a 90% confidence interval for the population mean height of male Swedes. We are 90% confident that the mean height of a male Swede is between 69.335 and 70.665 inches tall. We are 90% confident that the mean height of a male Swede is between 69.842 and 70.158 inches tall. We are confident that 90% of male Swedes have a height between 69.335 and 70.665 inches. We are confident that 90% of male Swedes have a height between 69.842 and 70.158 inches tall. Show off X ort_PPT19_CS...jpg 1:04 PM MOG ENG US 2022-10-27 OLDOguard.me EduRITA - Ass X (22 unread) - x Home - myUF X Blackboard Le x Cengage Lear x Mi Inbox (1,173) x + nment?id=9815901116 X Question 9 Part 2 of 2 Attempts Remaining: 2 Submit Answer Suppose 14 children, who were learning to ride two-wheel bikes, were surveyd to determine how long they had to use training whells. It was revealed that they used them an average of six months with a sample standard deviation of three months. Assume the underlying population distribution is normal. An educator says that the average time that children spend using training wheels is 5 months, does the confidence interval calculated from the previous part support her thought? (Yes/No), since 5 falls (into/outside) the 99% confidence interval. Show all X Support_PPT 19_CS..jpg 1:05 PM NOR ENG US 2022-10-27 W(22 unread) - x Home - myUF X Blackboard Le X Cengage Lear X Mi Inbox (1,173) x + iment?id=9815901116 Submit Answer A pharmaceutical company makes tranquilizers. It is assumed that the distribution for the length of time they last is approximately normal. Researchers in a hospital used the drug on a random sample of 9 patients. The effective period of the tranquilizer for each patient, in hours, was as follows: Hours 2.7 2.8 3.0 2.3 2.3 2.2 2.8 2.2 2.4 What does it mean to by 98% confident in this situation? If we repeatedly sampled 9 patients at a time, 98% of the resulting confidence intervals would contain the true population mean. If we repeatedly sampled the effective time of the tranquilizer on patients, 98% of them would fall within the interval. O if we repeatedly sampled 9 patients at a time, 98% of their tranquilizer effective times would fall within the interval. if we repeatedly sampled the effective time of the tranquilizer on patients, 98% of the resulting confidence intervals would contain the true population mean. Show all X Support_PPT 19_CS...jpg ENG 1:05 PM US 2022-10-27 W+ Select Question Return Question 2 Part 1 of 3 ? Attempts Remaining: 2 Submit Answer Among various ethnic groups, the standard deviation of heights is known to be approximately 2.8 inches. We wish to construct a confidence interval for the mean height of a male Swedes. Forty eight male Swedes are surveyed. The sample mean is 70 inches. What is the margin of error for a 90% confidence interval? 0.665 O 0.569 0.518 0.443 Show all X Support_PPT19_CS..jpg ENG 1:03 PM US 2022-10-27 ASUSample of 18 heads of lettuce was selected. The weight of each head of lettuce was then recorded andfo ppulation distribution of head weight is normal with standard deviation 0.2 lbs. ' ' ' lain and interpret the differences in the confidence interval. hassling the confidence level creates a (widerarrower) condence'inte asingiincreasingg'no changing; the area calculated in the normal distribution" guard.me EduRITA - Ass X (22 unread) - x Home - myUF x Blackboard Le X Cengage Lear X Mi Inbox (1,173) x + V X ment?id=9815901116 Question 6 Part 4 of 4 Attempts Remaining: 2 Submit Answer Twenty Americans were surveyed to determined the number of hours they spend watching television each month. It was revealed that they watched an average of 168 hours each month with a standard deviation of 30 hours. Assume that the underlying population distribution is normal. A sociologist claims that Americans spend an average of 185 hours watching TV each month , does the confidence interval calculated from the previous part support his claim? (Yes/No), since 185 falls (into/outside) the 95% confidence interval. Show all X upport_PPT 19_CS..jpg ENG 1:04 PM US 2022-10-27 3guard.me" EduRITA - Ass X (22 unread) - x Home - myUF x Blackboard Le X Cengage Lea X Mi Inbox (1,173) x + V X nment?id=9815901116 ? Question 6 Part 2 of 4 Attempts Remaining: 2 Submit Answer Twenty Americans were surveyed to determined the number of hours they spend watching television each month. It was revealed that they watched an average of 168 hours each month with a standard deviation of 30 hours. Assume that the underlying population distribution is normal. What is the margin of error for a 95% confidence interval for the mean number of hours that American's spend watching television each month? 14.040 13.148 13.993 11.598 Show all X Support_PPT19_CS..jpg 1:04 PM NOR ENG US 2022-10-27 WSuppose an accounting rm does a study to determine the time needed to complete one person' mean is 24.1 hours. Known that the population standard deviation is 7 hours. ' . An accountant thinks that the average time needed to com support her thought? _ (Yes;'No}, since 24.5 falls {:J {into/outside) the 90% condence interval. I piete one person's tax forms is 24.5 hours, does the condence ' .. ' EduRITA - Ass X (22 unread) - x Home - myUF x Blackboard Le x Cengage Lear X M Inbox (1,173) x + gnment?id=98159011 16 ? Question 5 Attempts Remaining: 2 Submit Answer The average height of young adult males has a normal distribution with a standard deviation of 2.4 inches. You want to estimate the mean height of students at your university within 0.5 inches with 97% confidence. How many male students must you measure? 109 O 108 82 O 21 Show all X Support_PPT19_CS..jpgBlackboard Le X Cengage Lear X M Inbox (1,173) x + ignment?id=9815901116 Question 8 Part 1 of 3 Attempts Remaining: 2 Submit Answer Six different national brands of chocolate chip cookies were randomly selected from the supermarket. The grams of fat per serving are as follows: 8, 7, 7, 11, 9, 10. Assume the underlying distribution is approximately normal. What distirbution would you use to construct a 98% confidence interval for the population mean grams of fat per serving of chocolate chip cookies sold in supermarkets. O to Ots ON(8.7, 0.7) ON(8.7, 1.6) Show all X Support_PPT19_CS..jpg ENG 1:05 PM W US 2022-10-27