4.44 Nearsighted: It is believed that nearsightedness affects about 8% of all children. In a random sample of194 children, 21 are nearsighted. Conduct a hypothesis test using the 5% significance level.a) Construct hypotheses appropriate for the following question: Do these data provide evidence that the 8%value is inaccurate?O Ho:p = 0.08HA:P + 0.08Но:р — 0.08НА:р> 0.08O Ho:p = 0.08НА:р < 0.08b) What proportion of children in this sample are nearsighted? Round your answer to 4 decimal places.c) Given that the standard error of the sample proportion is 0.0195 and the point estimate follows a nearlynormal distribution, calculate the test statistic (use the z-statistic). Round your answer to 2 decimal places.d) What is the p-value for this hypothesis test? Round your answer to 4 decimal places.p =

We have given that Sample size n =194 Favorable cases x =21 Sample proportion p^=x/n NOTE:-…

Answered: ighted: andom sample 194 children, 21…

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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5)
a) Identify the population parameters and state the hypotheses of the two-sided significance test comparing two population means. b) Calculate the test statistic. c) Explain how to make a conclusion for the significance test described in part a, using the 0.01 significance level. Interpret your conclusion in context.
A. What is the test statistic B. What is the p-value
An online poll asked: "Do you believe the Loch Ness monster exists?" Among 20,139 responses, 68% were "yes." Use a 0.10 significance level to test the claim that most people believe that the Loch Ness monster exists. How is the conclusion affected by the fact that Internet users who saw the question could decide whether to respond? www Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p=0.5 H₁: p0.5 H₁: p=0.5 O C. Ho: p=0.5 H₁: p=0.5 O D. Ho-p=0.5 H₁: p>0.5
An online poll asked: "Do you believe the Loch Ness monster exists?" Among 20,926 responses, 65% were "yes." Use a 0.01 significance level to test the claim that most people believe that the Loch Ness monster exists. How is the conclusion affected by the fact that Internet users who saw the question could decide whether to respond? Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p>0.5 H:p=0.5 O B. Ho: p= 0.5 H4:p0.5 O D. Ho: p=0.5 H:p#0.5 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is (Round to three decimal places as needed.) Identify the conclusion for this hypothesis test. O A. Reject Ho. There is not sufficient evidence to warrant rejection of the claim that most people believe that the Loch Ness monster exists. B. Reject Ho. There is sufficient…
Past studies have indicated that the percentage of smokers was estimated to be about 30%. Given the new smoking cessation programs that have been implemented, you now believe that the percentage of smokers has reduced. You randomly surveyed 1775 people and found that 492 smoke. Use a 0.05 significance level to test the claim that the percentage of smokers has reduced. a) Identify the null and alternative hypotheses? Ho: ? v Ha: ? v b) What type of hypothesis test should you conduct (left-, right-, or two-tailed))? O left-tailed O right-tailed O two-tailed c) Identify the appropriate significance level. Submit Question % & 8. 5.
A knewton.com Ch 9, part A - Intro to Hypothesis Testing | Knewton Ch 9, part C- Hypothesis Test for Pop Mean - Pop Std Dev Unknown | Question An SEO specialist is studying how satisfied companies are with their websites' conversion rates. The SEO specialist states the average percent of companies that are satisfied with their websites' conversion rates is greater than 27 percent. If we would like to test the SEO specialist's claim with a hypothesis test using a significance level of a = 0.05 , what is the rejection region? Use the graph below to show the rejection region. First, move the blue dot to choose the appropriate test (left-, right, or two- tailed). Then, slide the shaded region(s) to represent the rejection region. Sorry, that's incorrect. Try again? Move the blue dot to choose the appropriate test Rejection region= 0.005 MacBook Pro @ # 2$ & 2 3 4 6. 7 9. { W Y U
Is there a difference in the mean number of units that students take at LTCC, Foothill College, and DeAnza College? The results of the survey are shown below. LTCC 14 12 18 11 5 16 9 Foothill 15 10 4 18 19 17 16 13 DeAnza 4 9 5 12 14 5 18 A) State the null and alternate hypotheses. B) Conduct the appropriate hypothesis test at the 0.05 significance level. State what you entered into the calculator and find the pvalue. C) State the conclusion in the context of the problem.
Suppose 242 subjects are treated with a drug that is used to treat pain and 50 of them developed nausea. Use a 0.10 significance level to test the claim that more than 20% of users develop nausea. Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p=0.20 H₁: p0.20 H₁: p=0.20 OC. Ho: p=0.20 H₁: p>0.20 O D. Ho: p=0.20 H₁: p=0.20
a. set up appropriate null and alternative hypotheses of the test b. choose an appropriate test statistic and use the data to find the p-value
In 2011, a U.S. Census report determined that 71% of college students work. A researcher thinks this percentage has changed since then. A survey of 110 college students reported that 91 of them work. Is there evidence to support the reasearcher's claim at the 1% significance level? a) Determine the null and alternative hypotheses. Ho: P = Ha:p Select an answer 2 = b) Determine the test statistic. Round to two decimals. c) Find the p-value. Round to 4 decimals. P-value = d) Make a decision. (Put in the correct symbol and value) O Fail to reject the null hypothesis Reject the null hypothesis e) Write the conclusion. O There is sufficient evidence to support the claim that the percentage of college students who work is different than 71%.
When asked the question, "Do you believe Big Foot exists," out of 3,268 responses, 51.4% were "yes." Using a 0.05 significance level to test a claim that most people believe in Big Foot, a P-value of 0.0466 is found. State the initial conclusion and the final conclusion of the claim.

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