help please in this homework
Test Information Description Instructions 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, 24 minutes, 41 seconds. Question Completion Status: 1.> Moving to another question will save this response. Moving to another question will save this response. MacBook AirInstructions nts 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, 24 minutes, 34 seconds. Board S,/STAFF INFO * Question Completion Status: ITS CHAPTERS .> Moving to another question will save this response. Question 61 ng ims The test statistic for a certain left sided hypothesis test is zo=.40. At the 10% significance level, which of the following is false? O A. P-value > significance level ources O B. The correct answer is not among the choices. Help C. There is sufficient evidence to reject the null hypothesis Guide O D. The sample mean exceeds the mean stated in the null hypothesis O E. The test is not statistically significant ources Moving to another question will save this response. MacBook AirTimed 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, 26 minutes, 31 seconds. Question Completion Status: Moving to another question will save this response. > Question 48 1 points Save Answer For quality control purposes, the manufacturer of NFL footballs wishes to estimate the mean inflation pressure to within E = .015 lb of its true value with a 80% confidence interval. What sample size should be specified for the experiment? Use sto. deviation = .1 Please note: You are expected to destroy your scrap before you hit SUBMIT O A. 100 O B. 106 OG. 40 OD. 74 OE. 107 >> A Moving to another question will save this response. MacBook AirDescription Instructions 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, 24 minutes, 49 seconds. Question Completion Status: A Moving to another question will save this response. >> Question 59 1 points Save Answer For a medical study, a researcher wishes to select people in the middle 60% of the population based on blood pressure. If the mean systolic blood pressure is 120 and the standard deviation is 8, find the upper and lower readings that would qualify people to participate in the study. Assume normality. OA. (110.2, 129.8) O B. (114.8, 125.2) O C. `The correct answer is not among the choices. O.D. (113.3, 126.7) OE. (112, 128) > 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, 23 minutes, 47 seconds. Question Completion Status: > Moving to another question will save this response. >> Question 65 1 points Save Answer We want to test Ho: p = 4.5 versus Ha: p # 4.5 at the 5% significance level. A 95% confidence interval for p calculated from a given random sample is (1.4, 3.6). Based on this finding we: O A. The correct answer is not among the choices. O B. "Conclude that u 4.5 O.D. do not reject the null hypothesis Ho. OE Conclude that u is approximately 4.5 A Moving to another question will save this response. MacBook Airwh Browser * Test Information Description Instructions 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, 25 minutes, 26 seconds. Question Completion Status: Moving to another question will save this response. > Question 54 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. .724 O B. .223 O C. .0994 OD. .1088 OE .894 MacBook Airescription Instructions ments 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, 25 minutes, 10 seconds. Board S,/STAFF INFO * Question Completion Status: NTS CHAPTERS > A Moving to another question will save this response. Question 56 ing ams What is the variance of (3X- 6Y) if X and Y are independent variables? OA. 16 Var(X) + 4 Var(Y) O B. ources 256Var(X)+16Var(Y) Help O C. Guide 3 Var(X)- 6Var(Y) O.D. 9Var(X)+36Var(Y) urces OE. 9 Var(X) - 36 Var(Y) A Moving to another question will save this response. MacBook Airit 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, 25 minutes, 41 seconds. TAFF INFO * Question Completion Status: APTERS Moving to another question will save this response. >> Question 64 1 points Save Answer It can be shown that a certain distribution has a mean of 110 and a standard deviation of 20. What is the minimum percentage of the distribution between 80 and 140? Assume that nothing is known about the shape of the distribution -use Chebyshev's theorem. O A. 45.55% O B. 55.55% O C. 95.55% OD. 85.55% OE 35.55% > Moving to another question will save this response. MacBook Airinit automatically when the time expires. gs 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. ments JRES Remaining Time: 2 hours, 26 minutes, 07 seconds. ssion Board E HRS,/STAFF INFO * Question Completion Status: INMENTS LOOK CHAPTERS > A Moving to another question will save this response. ades Question 50 Meeting Ce Exams X - N(2.2 , 1.44). Find the P(X Moving to another question will save this response. Question 58 Which of the following is false? O A. The Gaussian is symmetric, bell shaped and unimodal. O B. If the population is normal, then the sampling distribution of the mean is normal regardless of the size of the sample. O C. The standard error of the mean decreases as the sample size increases. O.D. A length of the symmetric confidence interval for the mean u decreases as the confidence level increases. OE if sample size n is large, then the sampling distribution of the sample mean can be approximated by a normal curve regardless of whether t Moving to another question will save this response. MacBook Air
