A retrigerator manufacturer claims that the mean life of its refrigerators is greater than 18 years. You are asked to perform a hypothesis test to test this claim. (a) How would you write the null and alternative hypothesis if you represent the manufacturer and want to support the claim? (b) How would you write the null and alternative hypothesis if you represent the competitor and want to reject the claim? (a) Ho: 18 18 (b) Ho: 18 18

A retrigerator manufacturer claims that the mean life of its refrigerators is greater than 18 years. You are asked to perform a hypothesis test to test this claim. (a) How would you write the null and alternative hypothesis if you represent the manufacturer and want to support the claim? (b) How would you write the null and alternative hypothesis if you represent the competitor and want to reject the claim? (a) Ho: 18 18 (b) Ho: 18 18

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Description: A refrigerator manufacturer claims that the mean life of its refrigerators is greater than 18 years. You are asked to perform a hypothesis test to test this claim.(n) How would you write the null and alternative hypothesis if you represent the manuf

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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You've conducted a hypothesis test and now you're at the last step: the conclusion. You've for a test statistic of z = 1.87 and a critical value of +2.33 (i.e., a one tailed test). Based on this information, what would you conclude? O fail to reject the null hypothesis O reject the null hypothesis
It has recently been claimed that 25% of adults consider spring to be their favorite season of the year. A researcher is skeptical of this claim and believes this percentage is too low. She surveys a random of 1,000 adults and finds that 390 of these adults consider spring to be their favorite season of the year. As she prepares to conduct a hypothesis test, the researcher writes out her alternative hypothesis as “p < 0.25.” What is wrong with this? The alternative hypothesis should be “p > 0.39.” The alternative hypothesis should be “p < 0.39.” The alternative hypothesis should be “p > 0.25.” The alternative hypothesis should be “p = 0.25.” Nothing is wrong with the given alternative hypothesis.
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Please answer A B C(a) What conditions should you check first before you conduct the hypothesis test?(b) Write the null and alternative hypotheses.(c) What type of test are you doing: right-tailed, left-tailed or two-tailed?(d) What formula should be used for the test statistic?(e) What number is the test statistic equal to?(f) Sketch a graph of the p-value(g) What p-value do you obtain? Round to the ten-thousandths.(h) Do you reject the null hypothesis or fail to reject the null hypothesis? Explain.(i) Please write a conclusion sentence, in the context of the problem, that explains to a lay person the result of the hypothesistest.
Bonus Problem: For each situation, decide whether the null hypothesis should be rejected. (a) α = 0.01, P-value = 0.047, (b) α = 0.01, P-value = 0.15.
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An Internet provider is trying to gain advertising deals and claims that the mean time the competitors' customers spend online per day is less than 21 minutes. You are asked to test this claim. (a) How would you write the null and alternative hypotheses if you represent the Internet provider and want to support the claim? (b) How would you write the null and alternative hypotheses if you represent a competing advertiser and want to reject the claim? (a) H0: ▼ muμ sigma squaredσ2 pp sigmaσ ▼ greater than or equals≥ not equals≠ less than< less than or equals≤ greater than> 21 Ha: ▼ sigmaσ sigma squaredσ2 pp muμ ▼ not equals≠ less than< greater than> less than or equals≤ greater than or equals≥ 21 (b) H0: ▼ muμ sigmaσ pp sigma squaredσ2 ▼ greater than> greater than or equals≥ not equals≠ less than< less than or equals≤ 21 Ha: ▼ sigma squaredσ2 muμ sigmaσ pp…
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I don't know which part I get wrong but I only have 6/10. Could you check my answer please
A refrigerator manufacturer claims that the mean life of its competitor's refrigerators is less than 16 years. You are asked to perform a hypothesis test to test this claim. (a) How would you write the null and alternative hypothesis if you represent the manufacturer and want to support the claim? (b) How would you write the null and alternative hypothesis if you represent the competitor and want to reject the claim? (a) Ho Ha ▼ 16 16
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