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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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 two-tailed test is performed at the 0.10 level of significance. The p-value is determined to be 0.03. The null hypothesis O should not be rejected. has been designed incorrectly. O must be rejected. could be rejected, depending on the sample size.
Past studies have indicated that the percentage of smokers was estimated to be about 32%. Given the new smoking cessation programs that have been implemented, you now believe that the percentage of smokers has reduced. You randomly surveyed 1836 people and found that 552 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?H0H0: H1H1: b) What type of hypothesis test should you conduct (left-, right-, or two-tailed)? left-tailed right-tailed two-tailed c) Identify the appropriate significance level.d) Calculate your test statistic. Write the result below, and be sure to round your final answer to two decimal places.e) Calculate your p-value. Write the result below, and be sure to round your final answer to four decimal places.f) Do you reject the null hypothesis? We reject the null hypothesis, since the p-value is less than the significance level. We reject the…
An online poll asked: "Do you believe the Loch Ness monster exists?" Among 21,523 responses, 61% 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?
An online poll asked: "Do you believe the Loch Ness monster exists?" Among 21,489 responses, 64% 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? Identify the test statistic for this hypothesis test.
Past studies have indicated that the percentage of smokers was estimated to be about 34%. Given the new smoking cessation programs that have been implemented, you now believe that the percentage of smokers has reduced. You randomly surveyed 1708 people and found that 544 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?H0H0: H1H1: b) What type of hypothesis test should you conduct (left-, right-, or two-tailed)? left-tailed right-tailed two-tailed c) Identify the appropriate significance level.d) Calculate your test statistic (Use ˆpp^ rounded to 4 decimal places). Write the result below, and round your test statistic to 4 decimal places.e) Calculate your p-value. Write the result below, rounded to four decimal places.f) Do you reject the null hypothesis? We reject the null hypothesis, since the p-value is less than the significance level. We reject the…
help 14
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
What if a significance level of 0.01 was used instead? Would your decision and conclusion change? State the decision and conclusion based on this new significance level in two complete sentences.
A survey and research company claims that TV network A garnered 31% audience satisfaction. To test the claim, TV network A conducted a survey from 2000 randomly selected viewers all over the country with a 0.05 significance level. Which of the following is the correct null and alternative hypothesis? O a. H.: p > 0.69 Ha:p = 0.69 %3D O b. H.:p 0.31

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