Which of the following statistical methods should be usedto analyze the researcher's question?Welch t-testPooled t-testPaired t-testTwo Independent Population Proportions Hypothesis Test Real estate data were collected in San Luis Obispo Countyfrom August 2014. The following summarize the soldprices of 17 homes that sold in Pismo Beach and 37homes that sold in San Luis Obispo city. Researcherswould like to investigate whether the population meanprice for homes are the same in both locations SLO cityand in Pismo Beach.LocationDeviationPismo BeachSLON1737Mean821221548507Standard396519371599

The objective of the question is to identify the appropriate statistical test to determine if there…

Answered: Which of the following statistical…

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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Instructor-created question Question Help Response rates for customer complaints by Companies A and B are observed for 8 consecutive days and are given below. Although they have similar response rates on average, one claim is that they are not equally consistent in responding to customer complaints. Assuming that both populations are Normal, check this claim by testing the hypothesis that o, = o, against the alternative that o, to, at a= 0.05 significance level and by using the p-value approach 0.48 0.38 0.42 0.54 0.39 0.49 0.51 0.52 (A) 0.39 0.37 0.39 0.41 0.39 0.39 0.39 0.39 (B) (a) The f value for the test can be computed as (Round to two decimal places including any zeros.) (b) The p-value is the total tail probability corresponding to the calculated test value, which is then compared to a In a two-tailed test, this is 2P(F> f) or, in a right-tailed test, this is P(F>f). The p-value for the test can be calculated as (Round to four decimal places including any zeros.) (c) the null…
For the same sample data and null hypothesis, how does the P-value for a two-tailed test of ? compare to that for a one-tailed test?
CONFLICT RESOLUTION 4 of 4 What is your statistical decision? The Center for the Study of Violence wants to determine whether conflict-resolution program in a particular high school reduces aggressive behavior among its students. For 8 students, aggression was measured both before and after they participated in the conflict resolution course. What is your statistical decision? Their scores are below:
2) If you were interested in testing for a statistical relationship between taking Vitamin A and cold status in the population of elementary school students (i.e.: testing the null hypothesis of no difference in the proportion of colds in Vitamin A and placebo groups, versus the alternative hypothesis of a difference in proportions), the correct statistical test is: a. Two-sample t-test b. Ad-hoc test for testing the equality of things c. Chi-squared test d. Paired t-test
Consider the hypothesis test below. The following results are for independent samples taken from the two populations. Sample 1 Sample 2 n1=200 n2=300 pbar1=.25 pbar2=.17 Use pooled estimator of p.a. What is the value of the test statistic (to 2 decimals)?b. What is the p-value (to 4 decimals)?c. With a=.05 , what is your hypothesis testing conclusion?- Select your answer - Conclude the difference between the proportions is greater than 0 Cannot conclude the difference between the proportions is greater than 0 Icon Key Question 7 of 10 Exercise 10.29 (Self-Test) Algorithmic
An online poll asked: "Do you believe the Loch Ness monster exists?" Among 20,926 responses, 65% were "yes." Use a 0.01 significance level to test the claim that most people believe that the Loch Ness monster exists. How is the conclusion affected by the fact that Internet users who saw the question could decide whether to respond? Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho: p>0.5 H:p=0.5 O B. Ho: p= 0.5 H4:p0.5 O D. Ho: p=0.5 H:p#0.5 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is (Round to three decimal places as needed.) Identify the conclusion for this hypothesis test. O A. Reject Ho. There is not sufficient evidence to warrant rejection of the claim that most people believe that the Loch Ness monster exists. B. Reject Ho. There is sufficient…
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A recent study focused on the number of times men and women send a Twitter message in a day. The information is summarized here. Sample Size Sample Mean Sample Standard Deviation Men 25 23 5 Women 30 28 10 At the 0.01 significance level, we ask if there is a difference in the variances of the number of times men and women send a Twitter message in a day. What is the p-value for this hypothesis test? Multiple Choice 5.0% 0.05% 2.5% 1.0%
Randomly selected deaths of motorcycle riders in a region of the northern hemisphere are summarized in the accompanying table. Use a 0.05 significance level to test the claim that such fatalities occur with equal frequency in the different months. How might the results be explained? Month Number January 7 February 10 March 13 April 18 May 19 June 27 July August 27 September 26 October 12 25 November 9 December 9 A. Determine the null and alternative hypothesis. B. Calculate test statistic x2 (x squared). C. Determine P value. D. Determine conclusion for the hypothesis test.
Perform the following hypothesis test of a proportion: HO: p = 0.125 HA: p 0.125 The sample proportion is 0.1 based on a sample size of 95. Use a 10% significance level. The critical values of the test statistic that divide the rejection and non-rejection regions are what value?
Which of the following is the name for the statistical hypothesis that describes no change, or nothing expected? Type I error Null hypothesis Type II error Alternative hypothesis
Given the data below, what is the calculated test statistic? Placebo Medication 1 Medication 2 3 4 9 1 3 7 3 5 8 2 5 11 4 4 9 3 SS1 = 5.33 SS2 = 2.8 SS3 = 8.8 T1 = 16 T2 = 21 T3 = 44 n1 = 6 n2 = 5 n3 = 5 ∑X2 = 53 Do you reject the null? Yes No Was there a treatment effect for type of medication on number of anti-anxiety symptoms? Yes No

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