QUESTION 22For z-test, the p-value depends on:(a) the test statistic.(b) the number of degrees of freedom (df).(a) and (c).(c) the type of the test (left-tailed test, right-tailed test, two-tailed test) QUESTION 21Marketers believe that less 67% of adults in UAE own an iPhone. The appropriate null and alternative hypotheses areHo: p ≤ 0.67 vs Ha: p > 0.67.O Hop20.67 vs H:P<0.67.O Ho:p>0.67 vs H: p≤ 0.67.Ho: p=0.67 vs H₂:p*0.67.

The marketers believe that the percentage of owners of an iPhone in UAE is less than 67%.Consider…

Answered: QUESTION 21 Marketers believe that less…

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 random sample of 844 births included 431 boys. Use a 0.10 significance level to test the claim that 50.5% of newborn babies are boys. Do the results support the belief that 50.5% of newborn babies are boys? Identify the null and alternative hypotheses for this test. Choose the correct answer below. A. H0: p=0.505 H1: p<0.505 B. H0: p=0.505 H1: p≠0.505 Your answ C. H0: p≠0.505 H1: p=0.505 D. H0: p=0.505 H1: p>0.505 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. A. Fail to reject H0. There is not sufficient evidence to warrant rejection of the claim that 50.5% of newborn babies are boys. B. Reject H0. There is not…
42. Show that in Example 4.4.7, page 153, the difference between the two candidates is statistically significant even at a confidence level of 99.7%.
USA Today reported that about 47% of the general consumer population in the United States is loyal to the automobile manufacturer of their choice. Suppose Chevrolet did a study of a random sample of 1008 Chevrolet owners and found that 481 said they would buy another Chevrolet. Does this indicate that the population proportion of consumers loyal to Chevrolet is more than 47%? Use ? = 0.01. (a) What is the level of significance?State the null and alternate hypotheses. H0: p = 0.47; H1: p > 0.47H0: p = 0.47; H1: p < 0.47 H0: p > 0.47; H1: p = 0.47H0: p = 0.47; H1: p ≠ 0.47 (b) What sampling distribution will you use? The standard normal, since np > 5 and nq > 5.The standard normal, since np < 5 and nq < 5. The Student's t, since np > 5 and nq > 5.The Student's t, since np < 5 and nq < 5. What is the value of the sample test statistic? (Round your answer to two decimal places.)(c) Find the P-value of the test statistic. (Round your answer to four…
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
USA Today reported that about 47% of the general consumer population in the United States is loyal to the automobile manufacturer of their choice. Suppose Chevrolet did a study of a random sample of 1008 Chevrolet owners and found that 487 said they would buy another Chevrolet. Does this indicate that the population proportion of consumers loyal to Chevrolet is more than 47%? Use ? = 0.01. (a) What is the level of significance?State the null and alternate hypotheses. H0: p > 0.47; H1: p = 0.47H0: p = 0.47; H1: p ≠ 0.47 H0: p = 0.47; H1: p < 0.47H0: p = 0.47; H1: p > 0.47 (b) What sampling distribution will you use? The standard normal, since np < 5 and nq < 5.The standard normal, since np > 5 and nq > 5. The Student's t, since np < 5 and nq < 5.The Student's t, since np > 5 and nq > 5. What is the value of the sample test statistic? (Round your answer to two decimal places.)(c) Find the P-value of the test statistic. (Round your answer to four…
Suppose you are conducting a test of significance for the weight of a bag of Lay's Potato Chips. Your hypotheses are: Null: The population mean weight is 10 ounces. Alternative: The population mean weight is less than 10 ounces. From your random sample of 40 bags of chips, you conclude that the mean weight of all bags of Lay's chips is less than 10 ounces with a p-value of 0.017. Which of the following statements best describes what that p-value means? (A) The probability that the mean weight of all bags of Lay's chips is 10 ounces is 0.017. (B) If the mean weight of all bags of Lay's chips is 10 ounces, the probability that a random sample of 40 bags would have a mean as low or lower than the one found is 0.017. (C) If the mean weight of all bags of Lay's chips is less than 10 ounces, the probability that a random sample of 40 bags would have a mean as low or lower than the one found is 0.017. (D) The probability that the mean weight of all bags of Lay's chips is less than 10…
Suppose a chef claims that her meatball weight is less than 3 ounces, on average. Several of her customers do not believe her, so the chef decides to do a hypothesis test, at a 10% significance level, to persuade them. She cooks 15 meatballs. The mean weight of the sample meatballs is 3.1 ounces. The chef knows from experience that the standard deviation for her meatball weight is 0.6 ounces. What is the competing hypothesis in symbolic notation?
6. In a survey of 2563 adults from France, 1666 said that they believed that the activities of humans are contributing to an increase in global temperatures. A 95% confidence interval for the proportion p of adults in France, who thinks humans are contributing to an increase in global temperatures, is closest to (a) (0.3815, 0.4227) (b) (0.5315,0.7935) (c) (0.6315, 0.6685) (d) (0.1727,0.7819) (e) (0.2500, 0.7500)
A random sample of 843 births included 432 boys. Use a 0.10 significance level to test the claim that 50.6% of newborn babies are boys. Do the results support the belief that 50.6% of newborn babies are boys? ..... Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p=0.506 H1: p>0.506 О В. Но: р30.506 H1: p<0.506 ОС. Но: р3D0.506 H1: p#0.506 O D. Ho: p#0.506 H1: p=0.506
A random sample of 866 births included 430 boys. Use a 0.01 significance level to test the claim that 51.2% of newborn babies are boys. Do the results support the belief that 51.2% of newborn babies are boys? Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p=0.512 H₁: p>0.512 OB. Ho: p 0.512 H₁: p=0.512 C. Ho: p=0.512 H₁: p 0.512 OD. Ho: p=0.512 H₁: p<0.512 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is -0.91. (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.)
A newsletter publisher believes that less than 36%36% of their readers own a laptop. For marketing purposes, a potential advertiser wants to confirm this claim. After performing a test at the 0.010.01 level of significance, the advertiser failed to reject the null hypothesis. What is the conclusion regarding the publisher's claim?
Prof. Johnson conducts a hypothesis test on whether the proportion of all UBC students who bike to school (denoted as p) equals 30%. Specifically, Prof.Johnson has H, : p = 0.3 versus HA :p+ 0.3. He obtains a P-value of 0.01. On the other hand, Prof. Smith would like to test if there is sufficient evidence to support that p is greater than 0.3 at the 10% significance level. Based on Prof. Johnson's result, will the null hypothesis of Prof. Smith's test be rejected? O A. Yes. O B. No. O C. There is insufficient information to tell.

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QUESTION 21 Marketers believe that less 67% of adults in UAE own an iPhone. The appropriate null and alternative hypotheses are Ho: p ≤ 0.67 vs Ha: p > 0.67. O Ho: p20.67 vs H:p<0.67. Ho:p>0.67 vs H: p≤ 0.67. O Ho: p=0.67 vs H₂: P# 0.67.