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Question Completion Status: .> Moving to another question will save this response. Question 57 Which of the following is false? OA. If the population is normal, then the sampling distribution of the mean is normal regardless of the size of the sample. O B. The standard error of the mean decreases as the sample size increases. O C. A length of the symmetric confidence interval for the mean u decreases as the confidence level increases. OD. if sample size n is large, then the sampling distribution of the sample mean can be approximated by a normal curve regardless of whether the population is normal. OE The Gaussian is symmetric, bell shaped and unimodal. > Moving to another question will save this response. MacBook AirMultiple Att Force Completion This test can be ved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 2 hours, 38 minutes, 37 seconds. Question Completion Status: Ly Moving to another question will save this response. Question 46 It is known that 65% of Empire plan customers order their prescriptions via mail-order at least once a year. Suppose we randomly select 6 customers. Let X be the number of customers amongst these 6 who have placed an order via mail for prescription drugs in the last year. Which distribution does X follow? OA Normal distribution. O B. Binomial distribution. O C. Continuous distribution. O D. Bernoulli distribution. OE. There is not enough information to answer this question. A Moving to another question will save this response. MacBook AirWarnings appear when half time, 5 minutes, 1 minute, and 30 seconds remain. ationlly when the time expires. Multiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 2 hours, 38 minutes, 02 seconds. Question Completion Status: Close Window Ly Moving to another question will save this response. 2 estion 58 1 points Save Answer Seventeen people have been exposed to a particular disease. Each one independently has a 40% chance of contracting the disease. A hospital has the capacity to handle 10 cases of the disease. What is the probability that the hospital will have to deal with eleven or more people who have contracted the disease? OA .095 O B. .035 O C. .136 OD. .011 OE 605 Moving to another question will save this response. Question 41 Consider the following probability mass function of a discrete random variable: X 1 2 3 4 5 P(X=x) 0.15 0.3 0.2 0.15 Find the E(3X-2) OA 1.6 OB. 8.5 0 6 70 OD. The correct answer is not among the choices. OE 6.7 A Moving to another question will save this response. MacBook AirA Multiple Attempta Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 2 hours, 37 minutes, 46 seconds. * Question Completion Status: Close Window Moving to another question will save this response. Moving to another question will save this response. Question 42 Consider the following probability mass function of a discrete random variable: X 2 4 5 P(X=x) 0.15 0.3 0 . 2 0.15 Find the E(3X-2) OA 1.6 O B. 7.0 OC. The correct answer is not among the choices. OD. 8.5 OE 6.7 Moving to another question will save this response. MacBook AirWarnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. Multiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 2 hours, 37 minutes, 54 seconds. Question Completion Status: Close Window Ly Moving to another question will save this response. & Question 51 1 points Save Any A population is known to be normally distributed. A random sample of size 15 is taken. The sample mean is 75 and the sample standard deviation is 5. Find the right end point of a symmetric 95% confidence interval for the population mean u. OAT "The correct answer is not among the choices. OB. 77.769 O "2.727 OD 72.231 O E- 77.273 Moving to another question will save this response. Question 40 Consider the following probability mass function of a discrete random variable: X P(X=x) 0.15 0.3 0 3 4 5 0.15 Find P(X>4) OA The correct answer is not among the choices. O B. 0.35 0.3 OD. 0.15 O.E. 0.55 A Moving to another question will save this response. MacBook AirMultiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 2 hours, 38 minutes, 11 seconds. Question Completion Status: > Moving to another question will save this response. Question 49 Which of the following, concerning the standard normal distribution is false? OA P(Z > -1.5) = .006 O B. "P(Z 2.0) = .0228 OE P(Z Moving to another question will save this response. MacBook Air#minutes, 42 seconds. * Question Completion Status: Close Window Ly Moving to another question will save this response. 412, where u is the true mean weight of the cartridges. Calculate the p-value for this test. OA .0505 O B. .05

Moving to another question will save this response. MacBook AirInstructions Timed Test This test has a time limit of 3 hours. This test will save and submit automatically when the time expires. Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain. Multiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run If you leave the test. Remaining Time: 2 hours, 38 minutes, 30 seconds. Question Completion Status: Close Wind AMoving to another question will save this response. A Moving to another question will save this response. Question 56 scanttable.pdf.webloc z and t tables.pdf.webloc The prob. density function for a random variable is given by f(x) = x/6, (0 > Question 48 1 points Save Answer First grade children have heights that are normally distributed about a mean of 37 inches and a standard deviation of 2 inches. A random sample of size 25 is taken and the mean is calculated. Find the probability that the mean value (X-bar) will be between 36.5 and 41.0 inches OA .0994 O B. .1088 O C. .724 OD. .223 OE 894 Moving to another question will save this response. Close Wing MacBook AirForce Completion This test can be saved and resumed at any point until time has expired. The timer will continue to run if you leave the test. Remaining Time: 2 hours, 37 minutes, 40 seconds. Question Completion Status: .> A Moving to another question will save this response. Question 53 What is the variance of (3X- 6Y) if X and Y are independent variables? OA "3 Var(X)- 6Var(Y) O B. 9Var(X)+36Var(Y) O C. 256Var(X)+16Var(Y) OD. 16 Var(X) + 4 Var(Y) OE 9 Var(X) - 36 Var(Y) A Moving to another question will save this response. MacBook Air* Question Completion Status: Ly Moving to another question will save this response. Question 39 Consider the following probability mass function of a discrete random variable: P(X=x) 0.15 0.3 0.2 3 4 5 0.15 Find the missing value for P(4) if the above is to be a valid Probability Mass function. OA 0.20 O B. 0.25 O C. 0.05 OD. 0.30 OE Impossible to determine A Moving to another question will save this response. MacBook Air