Decide whether the normal sampling distribution can be used. If it can be used, test the claim about the difference between two population proportions p₁ and p2 at the given level of significance ausing the given sample statistics. Assume the sample statistics are from independent random samples.Claim:Sample statistics:Can a normal sampling distribution be used?NoYesIdentify the null and alternative hypotheses. Choose the correct answer below.OA. Ho: P₁ P2Ha: P₁ = P2B. Ho: P₁ = P2Ha: P₁ P2C. Ho: P₁ = P2Ha: P₁P2P₁ = P₂, α = 0.10x₁ = 94, n₁ = 161 and x₂ = 58, n₂ = 203D. Ho: P₁ P2Ha: P₁ = P₂2O E. A normal sampling distribution cannot be used, so the claim cannot be tested.Find the critical values. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.A. The critical values are -- Zo= and Z₁ =(Round to two decimal places as needed.)B. A normal sampling distribution cannot be used, so the claim cannot be tested.Find the standardized test statistic. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.A. Z=(Round to two decimal places as needed.)

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Resources Civo Up? O Hint Check. A USA Today poll asked a random sample of 1012 U.S. adults what they do with the milk in the bowl after they have eaten the cereal. Let p be the proportion of people in the sample who drink the cereal milk. A spokesman for the dairy industry claims that 70% of all U.S. adults drink the cereal milk. Suppose this claim is true. Verify the sampling distribution of p is approximately Normal. O Because np = 1012(0.70) = 708.4 > 10 and n(1- p) = 1012(0.30) = 303.6 > 10, the sampling distribution of ô is not approximately Normal. O Because p = 0.70, the sampling distribution of p is skewed to the left. O Because np = 1012(0.70) = 708.4 2 10 and n(1- p) = 1012(0.30) = 303.6 > 10, the sampling distribution of p is approximately Normal. Because 1012 > 30, the sampling distribution of p is not approximately Normal. O Because 7o > 30, the sampling distribution of p is approximately Normal. D IMG_0173.jpeg IMG 0174.jpeg Show all 1:00 PM 1/19/2021
Use technology to help you test the claim about the population mean, µ, at the given level of significance, a, using the given sample statistics. Assume the population is normally distributed. Claim: µ> 1170; a = 0.07; o = 212.01. Sample statistics: x= 1185.03, n= 300 Identify the null and alternative hypotheses. Choose the correct answer below. Ο Α. Ho μ2 1185.03 Ο Β. Ho : με 1185.03 Ha: µ 1185.03 O C. H μ2 1170 O D. Ho: µ> 1170 Ha: H 1185.03 Ha: µ> 1170 Ha: us1185.03 Calculate the standardized test statistic. The standardized test statistic is (Round to two decimal places as needed.) Determine the P-value. P = (Round to three decimal places as needed.) Determine the outcome and conclusion of the test. Ho. At the 7% significance level, there enough evidence to the claim.
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Test the claim below about the mean of the differences for a population of paired data at the level of significance a. Assume the samples are random and dependent, and the populations are normally distributed. Claim: H, =0; a= 0.05. Sample statistics: d = 3.2, s, =8.49, n= 9 Identify the null and alternative hypotheses. Choose the correct answer below. O A. Hg: Has0 O B. Ho: Hg #0 H: H >0 Hg: Hg =0 O C. Ho: Ha 0 H: Hg sO O E. Hg: Ha20 F. Hoi Ha =0 H: Hg #0 The test statistic is t= 1.13. (Round to two decimal places as needed.) The critical value(s) is(are) to =-2.31,2.31. (Round to two decimal places as needed. Use a comma to separate answers as needed.) Since the test statistic is the rejection region, V the null hypothesis. There V statistically significant evidence to reject the claim.
In looking at the results of a standardized exam, 72% of those taking the test choose the correct answer on the first question. Answer the following for 400 test takers who are to be randomly chosen. After taking the sample and administering the test, 320 of the test takers answer the first question correctly. The sample proportion is ____________________. Find the mean and variance for the distribution of sample proportions from samples of size n = 400. Mean: __________________ Variance: ___________________ The probability is ____________________ for taking another random sample of size n = 400 test takers and more than 75% of them getting the correct answer on this question.
Suppose that you want to perform a hypothesis test for a population mean. Assume that the population standard deviation is unknown and that the sample size is relatively small. In each part, the distribution shape of the variable under consideration is given. Decide whether you would use the t-test, the Wilcoxon signed-rank test, or neither. a. Triangular b. Symmetric bimodal c. Left skewed
Salaries for teachers in a particular state have a mean of $ 42000 and a standard deviation of $ 6900. Hint for parts a and b a. If we randomly select 15 teachers from that district, can you determine the sampling distribution of the sample mean? No C If yes, what is the name of the distribution? normal The mean? The standard error? b. If we randomly select 68 teachers from that district, can you determine the sampling distribution of the sample mean? If yes, what is the name of the distribution? The mean? The standard error?
Calculate the standard deviation and variance of the given random sample data. Round to two decimal places. x 23.3 15.4 8.4 29 28 14.5 Variance:
Decide whether the normal sampling distribution can be used. If it can be used, test the claim about the population proportion p at the given level of significance a using the given sample statistics. Claim: p#0.29; a = 0.10; Sample statistics: p 0.25, n= 184 Can the normal sampling distribution be used? O A. Yes, because pg is greater than a= 0.10. O B. No, because ng is less than 5. O C. No, because np is less than 5. O D. Yes, because both np and ng are greater than or equal to 5. State the null and alternative hypotheses O A. Ho: p20.29 Hp0.29 &c. Họi p= 0.29 H p#0.29 OD. The test cannot be performed. Determine the critical value(s). Select the correct choice below and, if necessary, fill in the answer box to complete your choice O A. The critical value(s) is/are (Round to two decimal places as needed. Use a comma to separate answers as needed.) O B. The test cannot be performed.
Please help. Aslo, is the first part's answer d? Thanks so much

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