An institute conducted a clinical trial of its methodsfor gender selection. The results showed that 187 of338 babies born to parents using a specificgender-selection method were boys. Use the signtest and a 0.01 significance level to test the claimthat the method has no effect on the likelihood of aboy.Let p denote the population proportion of baby boys.Ignore the possibility of the method decreasing thelikelihood of a boy. What are the null and alternativehypotheses?OA. Ho:p>0.5H₁: p=0.5OC. Ho: p=0.5H₁: p20.5B. Ho: p=0.5H₁: p > 0.5D. Ho: p=0.5H₁: p=0.5Find the test statistic.Test statistic = (Round to two decimal places asneeded.)

Answered: An institute conducted a clinical trial…

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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28% of students at a university bought lunch from the cafeteria on class days. On a recent class day, 486 students from this university were sampled and 149 of these had bought lunch from the school cafeteria. Use the appropriate formula to determine the test statistics (z-score) that can be used in a hypothesis test. (Do not preform the hypothesis test. No significance level is given, since you are NOT asked to do a complete test.)
The dean of a major university claims that the mean number of hours students study at her university (per day) is at most 5.6 hours. If a hypothesis test is performed, how should a decision that fails to reject the null hypothesis be interpreted?
Suppose 235 subjects are treated with a drug that is used to treat pain and 54 of them developed nausea. Use a 0.05 significance level to test the claim that more than 20% of users develop nausea.The test statistic for this hypothesis test is .(Round to two decimal places as needed.)
A 0.1 significance level is used for a hypothesis test of the claim that when parents use a particular method of gender selection, the proportion of baby girls is less than 0.5. Assume that sample data consists of 36 girls in 81 births. Complete (a) through (d) below. a. Identify the null hypothesis and the alternative hypothesis. b. What is the value of a? (an integer or decimal) c. Is the test two-tailed, left-tailed, or right-tailed? d. What is the P-value? (round to four decimal places)
Christine, a researcher in psychology and biobehavioral health, believes that city residents and residents of rural areas differ in how appealing they find owning a cat. A random sample of 109 people who live in San Antonio were surveyed and 59 identified themselves as a "cat person." A random sample of 108 people who live in the surrounding rural area were selected and 72 identified themselves as a "cat person." Conduct an appropriate hypothesis test at the a = 0.1 significance level to test Christine's claim. Round answers to 4 decimal places where appropriate. a. State the null and alternative hypotheses. Ho: ? ? ? ♥ H₁: ? b. What is the appropriate distribution to use for the hypothesis test? Select an answer ✓ ? ? ♥ c. Find the test statistic. Test Statistic: d. Determine the P-value: P-value: e. What decision results from the test? [Select an answer
USA Today (Feb. 17, 2011) described a survey of 1,008 American adults. One question on the survey asked people if they had ever sent a love letter using e-mail. Suppose that this survey used a random sample of adults and 205 stated that they had written a love letter using e-mail. Is this evidence that more than 20% of American adults have written a love letter using e-mail? Use a level of significance of 5%. a) p: (3 decimal places) b) Complete the following areas. Label the critical value and test statistic on the curve and shade the rejection region(s). Họ: Hi: Type of Test: Test Statistic: (2 decimal places) Critical Value(s): (2 decimal places) P-Value: (4 decimal places) Reject or Fail to Reject:
A newspaper is trying to see if opinions on the death penalty have changed over the last few decades. In 2003, 64% of adults said that they approved of the death penalty in some circumstances. The newspaper took a random sample of 1000 individuals and found that 675 of them were in support of the death penalty. Assuming a 5% significance level, what conclusion should the newspaper draw? O They should reject the null hypothesis; there is no evidence that opinions on the death penalty have changed O They should not reject the null hypothesis; there is evidence that opinions on the death penalty have changed O They should not reject the null hypothesis; there is no evidence that opinions on the death penalty have changed They should reject the null hypothesis; there is evidence that opinions on the death penalty have changed
Suppose 218 subjects are treated with a drug that is used to treat pain and 52 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. The test statistic for this hypothesis test is? The P-value for this hypothesis test is? Identify the conclusion for this hypothesis test.
In 2005, Health Canada claimed that 16.9% of Canadian adults are obese. A researcher wanted to check whether this percentage has changed in 2009. In 2009, he randomly selected 90 Canadian adults and found 12 of them are obese. Use a 7% significance level. The decision rule is either Reject Ho if Zcalc > 1.48 Reject Ho if Zcalc > 1.81 Reject H0 if Zcalc < -1.81 or Zcalc > 1.81 Reject H0 if Zcalc < -1.48 or Zcalc > 1.48
An annual survey of first-year college students asks 276,000 students about their attitudes on a variety of subjects. According to a recent survey, 51% of first-year students believe that abortion should be legal. Use a 0.05 significance level to test the claim that over half of all first-year students believe that abortion should be legal. Formulate the null and alternative hypotheses. Choose the correct answer below. .... A. Ho:p=0.5 O A. O B. Ho: p=0.5 Ha:p#0.5 Ha:p0.5 Find the test statistic. (Round to two decimal places as needed.) Find the P-value for the found test statistic. P-value = |(Round to four decimal places as needed.) State the conclusion. Choose the correct answer below. O A. Reject Ho. There is sufficient evidence to support the claim that over half of all first-year students believe that abortion should be legal. B. Do not reject Ho. There is sufficient evidence to support the claim that over half of all first-year students believe that abortion should be legal. C.…
A random sample of 200 students is taken at the University of Ottawa in order to determine the true proportion p who smoke marijuana. It is observed that 130 smoke marijuana. We wish to test Ho p = 0.75 H₁ p < 0.75 at the 0.05 significance level. The value of the test statistic and the decision are -3.27 reject the null hypothesis 3.27 do not reject the null hypothesis 2.45 reject the null hypothesis -2.45 reject the null hypothesis
Suppose a hypothesis test was performed with a level of significance of 0.05. Then if the null hypothesis is actually true, then there is a 5% chance that the researcher will end up rejecting the null hypothesis in error. True False

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