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

Name: A refrigerator manufacturer claims that the mean life of its refriger
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
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

See similar textbooks

Similar questions

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.
Homework help
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.
hii! can someone help with this? thank you!!
An Internet provider is trying to gain advertising deals and claims that the mean time a customer spends online per day is greater than 25 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) Ho: Ha: i ▶ 25 25
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…
Solve the problem. A researcher conducts a hypothesis test on a population proportion. Her null and alternative hypothesis are Ho: p = 0.6 and Ha: P < 0.6. The test statistic and p-value for the test are z = -1.51 and p-value = 0.0655. For a significance level of a = 0.05, choose the correct conclusion regarding the null hypothesis. O None of these. O There is sufficient evidence to warrant rejection of the null hypothesis. There is insufficient evidence to warrant rejection of the null hypothesis. STEP 1/3 Routin We're findi answer you In the mea DIVE DEEP
Scientist Irish used a paired t-test to test the effectiveness of a drug she is developing. She obtained a p-value = 0.005 (she used α = 0.05). Suppose the drug actually works. Which of the following statements is correct? Irish should not have rejected the null hypothesis because the p-value is too large. Type I error occurred. Type II error occurred. There was no error.
You may need to use the appropriate appendix table or technology to answer this question. In 2012, seventy percent of Canadian households had an internet connection. A sample of 370 households taken in 2013 showed that 76% of them had an internet connection. We are interested in determining whether or not there has been a significant increase in the percentage of the Canadian households that have internet connections. (a) State the null and alternative hypotheses to be tested. (Enter != for as needed. Let p be the proportion of all Canadian households with internet connections.) Ho: на: (b) Compute the test statistic. (Round your answer to two decimal places.) (c) The null hypothesis is to be tested at the 5% level of significance. Determine the critical value(s) for this test. (Round your answer(s) to two decimal places. If the test is one-tailed, enter NONE for the unused tail.) test statistic (d) What do you conclude? Do not reject Ho. We can conclude that there has been a…
I don't know which part I get wrong but I only have 6/10. Could you check my answer please