Question 3Which of the following is TRUE for hypothesis testing?The researcher always begins by assuming the null hypothesis Ha is false.O The researcher uses the sample data to decide whether the evidence favors Ho.O The researcher always begins by assuming the null hypothesis Ho is false.The researcher always begins by assuming the null hypothesis Ho is true.

Option four is correct answer. Explanation is given below.

Answered: Question 3 Which of the following is…

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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ANSWER A B C (b)Based on the answer to part (a), choose the correct statement. ___ The value of the test statistic is in the rejection region. ___ The value of the test statistic is not in the rejection region. (c)Based on your answer to part (b), which of the following statements is true at the significance level of 0.10 ? ___The null hypothesis must be rejected. ___The null hypothesis should not be rejected.
p5need part b -1.850wrong
iPad Kindle 9 10 5 9 8 10 7 9 8 12 9 10 11 10 11 Consumer Reports would like to conduct a hypothesis test to determine if the average battery life for an iPad is different from the average life for a Kindle Fire. The data provided here represent the battery life from a random sample of iPads and Kindle Fires in hours. (a) Conduct a two-sample t test to test if the average battery life for an iPad is different from the average life for a Kindle Fire. Provide the output below starting at the Yellow highlighted cell. Use 1% significance level. (b) Compute a 99% confidence interval for the difference in the average battery life for an iPad and the average life for a Kindle Fire. Provide your final anwers in the yellow highlighted cells below. ( Keep 3 or more decimal places) Show your work below those cells. Upper= Lower=
A researcher selects a sample of 20 participants and makes the decision to fail to reject the null hypothesis. She conducts the same study testing the same hypothesis with a sample of 100 participants and makes the decision to reject the null hypothesis. Give a likely explanation for why the two samples led to different decisions.
4. For each the following scenarios in (a) – (e), specify the correct hypothesis test you should use to analyze the data. a. Participants took part in a study on aversive noise and its performance on performing skilled tasks. Two groups of participants solved moderately difficult math problems while listening to a loud noise. One group heard the noise at fixed intervals, the other heard it at random intervals. b. A gerontologist wants to investigate whether an herbal dietary supplement enhances short-term memory in adults 85 years old and older. He dispenses the supplement to a group of 65 elderly persons living in a nursing facility. After four months, he measures the group's short term memory performance (M = 35). The performance for individuals 85 years and older in the population has a mean of u= 30 and a o= 10. %3D c. An industrial psychologist is concerned that a round of recent layoffs at a plant may have increased the stress felt by employees who retained their positions. To…
2
A restaurant manager wants to know if one of the three specials on the menu (baked fish, roast beef, or chicken salad) is more popular than the others. He selects a random sample of special orders and counts the number of orders in each category. The results are compiled in the following table. Fish Beef Chicken 48 46 53 Select the appropriate null hypothesis for this experiment?
In a two- tailed hypothesis test the test statistic is determined to be Z = - 2.4 . The p- value for this test is A. 0.0164 B. -1.250 C. 0.0062 D. 0.0124
The P-value for a hypothesis test is shown. Use the P-value to decide whether to reject Ho when the level of significance is (a) a = 0.01, (b) a = 0.05, and (c) a = 0.10. P=0.1162 (a) Do you reject or fail to reject H, at the 0.01 level of significance? O A. Reject H, because the P-value, 0.1162, is greater than a = 0.01. O B. Reject H, because the P-value, 0.1162, is less than a= 0.01. O C. Fail to reject Ho because the P-value, 0.1162, is less than a= 0.01. O D. Fail to reject H, because the P-value, 0.1162, is greater than a = 0.01. (b) Do you reject or fail to reject H, at the 0.05 level of significance? O A. Fail to reject H, because the P-value, 0.1162, is less than a = 0.05. O B. Reject Họ because the P-value, 0.1162, is greater than a = 0.05. O C. Fail to reject Ho because the P-value, 0.1162, is greater than a = 0.05. O D. Reject H, because the P-value, 0.1162, is less than oa = 0.05. (c) Do you reject or fail to reject Ho at the 0.10 level of significance? O A. Reject H,…
26-27 fast please Questions 26-27 refer to the following: Suppose a pharmaceutical company developed a new drug, designed to prevent the flu. The company states that the drug is more effective for women than for men. To test this claim, the drug was given to a random sample of 200 women and a random sample of 200 men. At the end of the study 82 of the women caught the flu and 104 of the men caught the flu. Conduct a hypothesis test to determine if the percentage for women is different than the percentage for men. 26. This hypothesis test for this problem: Group of answer choices must be a right-tailed test. must be a two-tailed test. must be a left-tailed test. can be any type of test, depending on how the hypotheses are set up. At the 2% level of significance, the appropriate conclusion is: Group of answer choices The proportion of women who caught the flu is lower than the proportion of men. The proportion of women who caught the flu is the same as the…
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