company that manufactures batteries used in electric cars is reporting that their newest model of battery has a mean lifetime, u, 15 years. To test the company's claim, a competitor has selected 62 of these batteries at random. The mean lifetime of the ample is 13.9 years. Suppose the population standard deviation of these lifetimes is known to be 3.7 years. 2021 s there enough evidence to reject the claim that the mean lifetime of the newest model is 15 years? Perform a hypothesis test, sing the 0.05 level of significance. r.jpg (a) State the null hypothesis Ho and the alternative hypothesis H,. O

company that manufactures batteries used in electric cars is reporting that their newest model of battery has a mean lifetime, u, 15 years. To test the company's claim, a competitor has selected 62 of these batteries at random. The mean lifetime of the ample is 13.9 years. Suppose the population standard deviation of these lifetimes is known to be 3.7 years. 2021 s there enough evidence to reject the claim that the mean lifetime of the newest model is 15 years? Perform a hypothesis test, sing the 0.05 level of significance. r.jpg (a) State the null hypothesis Ho and the alternative hypothesis H,. O

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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If you have do not have enough evidence to reject the null hypothesis at the 5% significance level using the critical value method, you will not have enough evidence to reject at the 10% significance level. True O False
And experimenter who fears the possibility of retaining the null hypothesis when it is actually false: a. Here's a type 2 error in and should said the significance level of .10 b. fears a type 1 error and should set the significance level at .01 c. fears a type 2 error and should set the significance level at .01 d. fears a type 1 error and should set the significance level at .10
23. The statement “If there is sufficient evidence to reject a null hypothesis at the 5% significance level, then there is sufficient evidence to reject it at the 10% significance level" is (A) Always True (B) Never True (C) Sometimes True; the p-value for the statistical test needs to be provided for a conclusion (D) Not Enough Information; this would depend on the type of statistical test used
23. The statement “If there is sufficient evidence to reject a null hypothesis at the 5% significance level, then there is sufficient evidence to reject it at the 10% significance level” is (A) Always True (B) Never True (C) Sometimes True; the p-value for the statistical test needs to be provided for a conclusion (D) Not Enough Information; this would depend on the type of statistical test used If you feel the answer is none of the choices given, submit no answer to the question.
7. a). What does it mean if a researcher said she rejected the null hypothesis at the .05 level? b). Describe the data that are collected for an independent-measures t test and the hypothesis that the test evaluates.
Is there a relationship between the number of votes received by candidates for public office and the amount spent on their campaigns? Candidate Amount spent (000) Votes received (000)Weber $3 14Taite $4 7Spencer $2 5Lopez $5 12 Using a 0.01 significance level, do the formal hypothesis test (using critical values).Remember to show your steps (including all relevant information) please show the steps on how to solve it. ( no excel please)
You receive a brochure from a large university. The brochure indicates that the mean class size for full-time faculty is fewer than 31 students. You want to test this claim, You randomly select 18 classes taught by full-time faculty and determine the class size of each. The results are shown in the table below, At a = 0.01. can vou support the university's claim? Complete parts (a) through (d) below. Assume the population is normally distributed. 32 26 27 30 31 37 23 28 320 29 27 37 32 31 25 31 29 22 (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states Ho and Ha? O C. Ho: H=31 O A. Ho: H> 31 Hai H531 O B. Ho: H231 Ha:H31 (b) Use technology to find the P-value. P= (Round to three decimal places as needed.) (c) Decide whether to reject or fail to reject the null hypothesis. Which of the following is correct? O A. Fail to reject Ho because the P-value is less than the significance level. O B. Reject H because the P-value is less than the…
Is there a relationship between the number of votes received by candidates for public office and the amount spent on their campaigns? Candidate Amount spent (000) Votes received (000)Weber $3 14Taite $4 7Spencer $2 5Lopez $5 12Using a 0.01 significance level, do the formal hypothesis test (using critical values).Remember to show your steps (including all relevant information) show the steps on how to solve it
Passed Failed White Results from a civil servant exam are shown in the table to the right. Is there sufficient evidence to support the claim that the results from the test are discriminatory? Use a 0.05 significance level. 16 14 candidates Minority candidates 7 21 Determine the null and alternative hypotheses. O A. Ho: White and minority candidates do not have the same chance of passing the test. H4: White and minority candidates have the same chance of passing the test. B. Ho: A white candidate is more likely to pass the test than a minority candidate. H,:A white candidate is not more likely to pass the test than a minority candidate. Ho: A white candidate is not more likely to pass the test than a minority candidate. H,: A white candidate is more likely to pass the test than a minority candidate. D. Ho: White and minority candidates have the same chance of passing the test. H,: White and minority candidates do not have the same chance of passing the test. Determine the test…