Assume that matched pairs of data from a poll of Internet users who were asked if they make travel plans through theInternet result in 350 positive signs, 319 negative signs, and 36 ties when the value of the second variable is subtractedfrom the corresponding value of the first variable. Use the sign test with a 0.05 significance level to test the nullhypothesis of no difference.Let ₁ denote the median of the first variable and 1₂ denote the median of the second variable. What are the nulland alternative hypotheses?OA. Ho: n₁ = 12H₁: 1₁ #1₂OC. Ho: 1₁2 112H₁: 1₁ <1₂Find the test statistic.Test statistic =Find the P-value.(Round to two decimal places as needed.)P-value= (Round to four decimal places as needed.)Does the null hypothesis of no difference hold?B. Ho: 1₁ = 12H₁: 1₁ <12O D. Ho: 1₁ #12H₁:1₁ =1₂OA. Since the P-value is less than the significance level, fail to reject the null hypothesis of no difference.OB. Since the P-value is greater than the significance level, reject the null hypothesis of no difference.OC. Since the P-value is less than the significance level, reject the null hypothesis of no difference.O D. Since the P-value is greater than the significance level, fail to reject the null hypothesis of no difference.

The objective is to test the null hypothesis of no difference by using sign test at 0.05 level of…

Answered: Assume that matched pairs of data from…

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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Classify the hypothesis test as two-tailed, left-tailed, or right-tailed. A psychologist has designed a test to measure stress levels in adults. She has determined that nationwide the mean score on her test is 26. A hypothesis test is to be conducted to determine whether the mean score for trial lawyers exceeds the national mean score. OA) Two-tailed OB) Left-tailed OC) Right-tailed
Assume that matched pairs of data from a poll of Internet users who were asked if they make travel plans through the Internet result in 304 positive signs, 278 negative signs, and 35 ties when the value of the secon variable is subtracted from the corresponding value of the first variable. Use the sign test with a 0.05 significance level to test the null hypothesis of no difference. Let ₁ denote the median of the first variable and 12 denote the median of the second variable. What are the null and alternative hypotheses? O A. Ho: 1₁2 112 H₁:1₁ <1₂ OC. Ho: 11₁ 112 H₁: 1₁ <12 O B. Ho: 11 #11₂ H₁:1₁ =1₂ O D. Ho: 111 112 H₁:1₁ #1₂ Find the test statistic. Test statistic = Find the P-value. P-value= (Round to four decimal places as needed.) Does the null hypothesis of no difference hold? (Round to two decimal places as needed.) O A. Since the P-value is less than the significance level, reject the null hypothesis of no difference. O B. Since the P-value is greater than the significance…
Lan says that students’ favorite restaurants in Conway are not equally distributed between ZaZa’s, Umami, Mike’s Place, Brick and Forge, and The Pasta Grill. Nynaeve tests this claim by asking 40 students what their favorite restaurant is. Her survey results are 12 for ZaZa, 6 for Umami, 3 for Mike’s Place, 8 for Brick and Forge, and 11 for The Pasta Grill. Test the validity of Lan’s claim with a significance level of α = 0.05. [Hint: You are testing whether your data is a good fit against the presumption that all are equal.]
Suppose we measure GPA for people in our class, we find the mean is 2.8 and the median is 3.2. What can you say is most likely true about GPAs in our class?
11. In professional tennis for 2017 men challenged 2100 calls and 1105 of them were changed. While women challenged 1309 calls and 625 of them were changed. Conduct a hypothesis test to test the claim that men get more calls changed than women. Use a significance level of 0.05.
A long-term study followed 128 women throughout their lifetime. Among thevarious data collected, one interesting result was that 35 of these women hadsuffered from a migraine at some point in their life Use the results of this study to test the claim that the percentage(proportion) of women in the population that will suffer from a migraine isless than 35% in their lifetime. Use 0.05 significance level. Use symbolsand words to express your answer.
ific Calculator Of30shg/ckivdfk1p00003g5tgeftOid1 Agroup of researchers in New York wants to test if there is any relationship between living in California and preferring warm weather to cold weather. The researchers send out an online questionnaire to 200 randomly chosen people in the US asking several questions including: "Do you live in California?" and "Do you prefer warm weather to cold weather?". The results are summarized in the table below: Prefers Warm Weather 80 Prefers Cold Weather 42 Lives in California Doesn't Live in California 35 43 Test the null hypothesis that the choices on these two questions are independent versus the alternative that they are dependent. What are the p-value and conclusion of this test if the test is performed at the alpha =0.1 level? %3D p-value = 0.0091; Fail to reject the null hypothesis %3D p-value = 0.0039; Reject the null hypothesis p-value = 0.0039; Fail to reject the null hypothesis p-value = 0.0911; Reject the null hypothesis NEXT
There is some research to indicate that different dog breeds differ in emotionality. To consider these differences, a researcher administers a standard test of emotionality to 3 breeds of dogs (German Shepherd, Cocker Spaniel, and Chihuahua), with 4 dogs from each breed being tested. Higher scores mean higher emotionality. The results for the emotionality test scores appear below. Using the 7 steps of hypothesis testing, test the idea that there are differences in emotionality based on dog breed using α = .05 Emotionality Scores for Dogs German Shepherd Cocker Spaniel Chihuahua 6 0 10 1 4 12 7 0 9 2 0 8 T = 16 T = 4 T = 39 Gt = 59 N = 12 ∑x2 = 495 4. Decision Rule (Be sure to include your critical value) 5. Do your calculations 6. Make your decision 7. State your results in a sentence. Report your results in APA style including a measure of effect size. Be sure to include descriptive statistics (M). 8. Given your decision in #7, would…
Suppose 231 subjects are treated with a drug that is used to treat pain and 55 of them developed nausea. Use a 0.10 significance level to test the claim that more than 20% of users develop nausea. Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is Identify the P-value for this hypothesis test. The P-value for this hypothesis test is
Assume that matched pairs of data from a poll of Internet users who were asked if they make travel plans through the Internet result in 373 positive signs, 333 negative signs, and 22 ties when the value of the second variable is subtracted from the corresponding value of the first variable. Use the sign test with a 0.10 significance level to test the null hypothesis of no difference. Let ₁ denote the median of the first variable and 12 denote the median of the second variable. Wha are the null and alternative hypotheses? A. Ho: 1₁ #1₂ H₁:1₁ =11₂ C. Ho: 1₁ =1₂ H₁:1₁ <1₂ Find the test statistic. Test statistic = needed.) OB. Ho: 1₁ 2112 H₁:1₁ <1₂ D. Ho: 1₁ =112 H₁:1₁ #1₂ (Round to two decimal places as
Suppose a hypothesis test will be used to investigate whether the proportion of United States adults who have been a victim of a cybercrime, such as identity theft, is greater than 0.25. Suppose that the hypothesis test is conducted using a significance level of 0.05 and the power of the test is determined for a specific alternative value using the significance level of 0.05. If the significance level of the hypothesis test is changed to 0.01 and the power of the test is computed for the same alternative value using a significance level of 0.01, which of the following best describes the change(s) to the probability of a Type I error and the power of the test? (A) The probability of a Type I error would decrease, and the power of the test would stay the same. (B) The probability of a Type I error would decrease, and the power of the test would increase. (C) The probability of a Type I error would decrease, and the power of the test would decrease. (D) The probability of a Type I error…
erik, a tourism expert, is researching the number of overnight stays at two large hotels. He collected data for 30 days and calculated that the average number of overnight stays in one hotel was 135 nights and the standard deviation was 22 nights, while in the other hotel the average was 22 nights. mean) 142 and the standard deviation 18 nights. erik used an appropriate hypothesis test to examine whether there was a difference in the distribution of the number of overnight stays in the two hotels (e. Used an appropriate hypothesis test to test if there is a difference in the variance in overnight stays at the two hotels). What is the value of the test statistic? 1.22 0.82 0.95 1.49 0.67

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