Home - Netflix X Logout - Time X S Shop Trendy V X Hurry! Iter x Disney+ IN elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_97920047_1?courseld=_ 109 minutes remaining 48 OF 50 QUESTIONS REMAINING Question 35 2 Points In order to estimate the population mean spent for textbooks per student, a random sample of 75 students was selected which resulted in a sample mean of X= $ 158.30. Assume a population standard deviation of = $35. Find a 95% confidence interval for the population mean cost of textbooks. A ($147.89, $168.71) B ($150.38, $166.22) C ($151.65, $164.95) D ($153.45, $163.15) Question 36 2 Points Suppose a pizza place delivers to the local area at no charge to customers. The owner is interested in estimating the mean tip income for drivers per delivery. Data is collected and the following 99% confidence interval is formed, (1.22, 2.53). Interpret this confidence interval. A We are 99% confident that the sample mean tip income for drivers per delivery is between $1.22 and $2.53. We are 99% confident that the population mean tip income for drivers per delivery is between $1.22 and $2.53. B MacBook Air Dll 20 F6 F7 F8 F3 F4 F5 & $ % 8 @ 6 4MyPath - Hon X View Assessm X N Home - Netflix X & Logout - Time x S Shop Trendy X - Fashion N C elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_9 X 110 minutes remaining 48 OF 50 Q Question 20 Find P(z > 0.3) A 0.9987 B 0.6179 C 0.3821 (D 0.0013 Question 21 Find P(z Disney+ IM elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_97920047_1? courseld=_4 109 minutes remaining 48 OF 50 QUESTIONS REMAINING Question 36 2 Points Suppose a pizza place delivers to the local area at no charge to customers. The owner is interested in estimating the mean tip income for drivers per delivery. Data is collected and the following 99% confidence interval is formed, (1.22, 2.53). Interpret this confidence interval. A We are 99% confident that the sample mean tip income for drivers per delivery is between $1.22 and $2.53. B We are 99% confident that the population mean tip income for drivers per delivery is between $1.22 and $2.53. C We conclude that 99% of the sample is between $1.22 and $2.53. D We conclude that 99% of all tips is between $1.22 and $2.53. 2 Points Question 37 What affect will there be on a confidence interval if you increase the level of confidence from 90% to 99%? Increasing the confidence level does not affect the interval. B Increasing the confidence level increases the level of significance for the interval. Increasing the confidence level will decrease E and thus make the interval more narrow. C Increasing the confidence level will increase E and thus increase the width of the interval. D MacBook Air DD Dll F8 F7 20 F6 F5 F4 F3 F1 F2 & % 8 #yPath - Hom X View Assessm X Home - Netflix x Logout - Time x S Shop Trendy V X Hurry! Iter X C A elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_9792004 X 108 minutes remaining 48 OF 50 QUESTION Question 42 The probability with which we are willing to risk a Type I Error in hypothesis testing is called what? A Power B Level of Significance C) Level of Confidence D p-value Suppose we wish to test if the population mean normal body temperature is less than 98.6 degrees. In a random sa of n = 40 individuals, the sample mean is *= 98.417. Assume the population standard deviation is = 0.836. Use scenario to answer questions 43 - 46. Question 43 2 Poi State the alternative hypothesis. MacBook Air 20 F5 F6 F7 SC F2 F3 F4 F1elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview X 109 minutes remaining D a =.10 Question 34 The z-value used for a 95% confidence interval is what? A 1.645 B 1.83 C 1.96 D 2.576 Question 35 In order to estimate the population mean spent for textbooks per student, a random sample of 75 studer resulted in a sample mean of X- $ 158.30. Assume a population standard deviation of = $35. Finda for the population mean cost of textbooks. A ($147.89, $168.71) B ($150.38, $166.22) MacBook AirHom X View Assessm X Home - Netflix X Logout - Time x S Shop Trendy V X x Fashion Nova x Disney+ elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_97920047_1? courseld= 108 minutes remaining 48 OF 50 QUESTIONS REMAINING Suppose we wish to test if the population mean normal body temperature is less than 98.6 degrees. In a random sample of n = 40 individuals, the sample mean is * = 98.417. Assume the population standard deviation is =0.836. Use this scenario to answer questions 43 - 46. Question 43 2 Points State the alternative hypothesis. A Hai H Disn elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_97920047_1?cours 108 minutes remaining 48 OF 50 QUESTIONS REMAIN Question 41 2 Points The table below allows us to identify the types of errors involved in performing a hypothesis test. Which cells in the table correspond to making an error? Ho is False Ho is True Reject Ho Cell 1 Cell 2 Fail to Reject Ho Cell 3 Cell 4 A Cell 1 is a Type I Error and Cell 4 is a Type II Error B Cell 2 is a Type I Error and Cell 3 is a Type II Error C Cell 1 is a Type II Error and Cell 4 is a Type I Error D Cell 2 is a Type II Error and Cell 3 is a Type | Error 2 Points Question 42 The probability with which we are willing to risk a Type I Error in hypothesis testing is called what? MacBook Air DII F8 20 F5 F6 F7 F3 F4 F1 F2 & % OOPath - Hom X View Assessm X Home - Netflix X Logout - Time x S Shop Trendy V X o Hurry! Iten x C elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_97920047 X 110 minutes remaining 48 OF 50 QUESTIONS Question 23 A glucose level of 140 would have a standard score (z-score) of what? A 0.6 1.4 C 2.2 D W Question 24 2 P Find the proportion of people whose glucose level would be less than 122.5. A 0.1587 B 0.6915 C 0.9332 D 0.9773 MacBook Air 20 F7Hom X View Assessm X N Home - Netflix X Logout - Time x S Shop Trendy V X Hurry! Iten x Disney+ | Mo elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_97920047_1?courseld=_49 110 minutes remaining 48 OF 50 QUESTIONS REMAINING Question 28 2 Points In the diagram below, 1, 2, and 3 represent sampling distributions of three statistics that might be used to estimate a parameter , Identify the statistic that would typically be the best estimator. . .. W 2 anmum an A Statistic 1 B Statistic 2 C Statistic 3 MacBook Air DII 20 F7 F8 F5 F6 F2 F3 F4 K % & # $ 4 5C elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/atter 110 minutes remaining 48 0 D Statistic Question 27 The probability of a statistic over all possible samples is known as what? A Sampling Distribution B Conditional Probability C Complement D Probability Distribution Question 28 In the diagram below, 1, 2, and 3 represent sampling distributions of three statistics that might be used to esti Identify the statistic that would typically be the best estimator. 3 2 MacBook AirHom X View Assessm X N Home - Netflix x Logout - Time x S Shop Trendy V X |Fashion Nova X > Disney+ IM elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_97920047_1?courseld=_ 108 minutes remaining 48 OF 50 QUESTIONS REMAINING The American Dental Association is interested to see if more than 4%% of Americans currently have braces. In order to do this, they take a random sample of 7 = 2000 Americans and find that = 5% currently have braces. Use this scenario to answer questions 47 - 50. Question 47 2 Points State the null hypothesis. A Ha: P> .04 B Hai p > .05 C Ho: PS.04 D Ho: ps.05 2 Points Question 48 Calculate the test statistic. A 2.3 MacBook Air DII F8 F7 20 F5 F6 F4 F2 F3h - Hom X View Assessm X N Home - Netflix X Logout - Time x S Shop Trendy V X MEN Fashion Nova X > Disney+ | Mov X C elearning.kctcs.edu/ultra/courses/_493658170_1/outline/assessment/_43252623_1/overview/attempt/_97920047_1?courseld=_493658 110 minutes remaining 48 OF 50 QUESTIONS REMAINING Suppose the level of glucose in the blood is normally distributed with a mean of 85 and a standard deviation of = 25. Use this scenario to answer questions 22 - 25. Question 22 2 Points Based on the empirical rule 68% of the observations will fall within what interval? A) (72.5, 97.5) B (60, 110) C (47.5, 122.5) D (35, 135) 2 Points Question 23 A glucose level of 140 would have a standard score (z-score) of what? A) 0.6 MacBook Air DII 20 F6 F7 F8 F2 F4 F5 F3