Conduct a 6 Step Test of Hypotheses TRY IT 9.18Marketers believe that 92% of adults in the United States own a cell phone. A cell phonemanufacturer believes that number is actually lower. 200 American adults are surveyed, of which, 174report having cell phones. Use a 5% level of significance. State the null and alternative hypothesis,find the p-value, state your conclusion, and identify the Type I and Type II errors.

For the given data perform z test for one proportion test

Answered: Marketers believe that 92% of adults in…

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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9) from the given problem about the Male & female Occupations, What is the Decision? * A Reject Ha B Accept Ho C Reject Ho 10) from the given problem about the Male & female Occupations, What is the Conclusion? * A Accept Ho B Accept Ha C Reject Ha
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Stocks and Mutual Fund Ownership It has been found that 50.8% of U.S. households own stocks and mutual funds. A random sample of 300 heads of households indicated that 173 owned some type of stock. At what level of significance would you conclude that this was a significant difference? Use the P-value method. (a) State the hypotheses and identify the claim. H0: claim/ do not claim▼(Choose one) H1: claim/do not claim▼(Choose one) This hypothesis test is/is not a ▼(Choose one) test. b) Compute the test value. Always round z score values to at least two decimal places. z= c) Find the P-value. Round your answer to at least four decimal places. P-value= (d) At what level of significance is this a significant difference? Reject H0 for any significance level ▼(Choose one) than the P-value is, but fail to reject otherwise.
Imagine that a study of prostate cancer was initiated in Des Moines, Iowa. A total of 1,000 men, 55-64 years of age, with no prior evidence of prostate cancer were enrolled in the study. Each year during the study, the men being observed were examined and tested for presence of prostate cancer. The results of annual examinations revealed: 10 cases confirmed at 1st exam 15 additional cases at 2nd exam 20 additional cases at 3rd exam 25 additional cases at 4th (final) exam What is incidence density of prostate cancer in this group?
03 Write Appropriate Hypotheses 3) A researcher interested in investigating the effectiveness of two drugs randomly divides 150 volunteers into five equal groups-placebo, double dose of drug 1, single dose of drug 1, double dose of drug 2, single dose of drug 2-then measures the platelet level of each patient. Write the appropriate hypotheses to test the hypotheses that at least one of the population mean platelet levels for these treatments are different. Be sure to identify your parameter and label your groups appropriately.
A legal researcher was interrested in gender differences in the willingness of prosecutrs to plea bargain. She recorded the number of times they plea bargained out of their last 10 cases for a sample of eight female prosecutors and seven male prosecutors. Table 2 shows the number of plea bargain cases by gender. Females Males 9 4 3 5 5 7 9 4 9 3 5 4 7 3 5 From performing a hypothesis test to determine if female and male prosecutors differ in their plea bargaining of cases what is the p value?
3
The mayor of a town has proposed a plan for the construction of a new bridge. A political study took a sample of 1400 voters in the town and found that 53% of the residents favored construction. Using the data, a political strategist wants to test the claim that the percentage of residents who favor construction is more than 50%. Make the decision to reject or fail to reject the null hypothesis at the 0.02 level.
A sample of 800 computer chips revealed that 43% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature claimed that more than 38% do not fail in the first 1000 hours of their use. Is there sufficient evidence at the 0.01 level to support the company's claim? State the null and alternative hypotheses for the above scenario.
a)What is tcrit for a two sample, one tailed t-test, with n=22, n= 14 and α=0.05? b)What is tcrit for a two sample, two tailed t-test, with n=10, n= 18 and α=0.01?
Twenty university students chosen at random from students enrolled at Carthage College took part in an experiment testing the effect of watching ABC News versus CNN on knowledge of world events. The 20 participants were divided randomly into two equal groups of 10 students each. One group was assigned to watch ABC and the other was assigned to watch CNN. Participants then watched their assigned station (ABC or CNN) for 3 hours a night for 4 weeks. At the end of the 4 week period they were administered a test of world knowledge. The results were as follows: XbarABC = 104; sABC = 12 XbarCNN = 99; sCNN = 10 Compute the 95% confidence interval around the difference between the two groups.
An airline company is interested in improving customer satisfaction rate from the 70% currently claimed. The company sponsored a survey of 165 customers and found that 125 customers were satisfied. Determine whether sufficient evidence exists that the customer satisfaction rate is higher than the claim by the company.

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