16. Weinstein, McDermott, and Roediger (2010) reportthat students who were given questions to be answeredwhile studying new material had better scores whentested on the material compared to students who weresimply given an opportunity to reread the material.In a similar study, an instructor in a large psychol-ogy class gave one group of students questions tobe answered while studying for the final exam. Theoverall average for the exam was u = 73.4 but then3D16 students who answered questions had a meanof M = 78.3 with a standard deviation ofo = 8.4. Forthis study, did answering questions while studyingproduce significantly higher exam scores? Use a one-tailed test with a = .01.

From the given information, Sample size (n) = 16 Overall average (µ) =73.4 Sample mean (M) =78.3…

Answered: 16. Weinstein, McDermott, and Roediger…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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A paper investigated the driving behavior of teenagers by observing their vehicles as they left a high school parking lot and then again at a site approximately 1 2 mile from the school. Assume that it is reasonable to regard the teen drivers in this study as representative of the population of teen drivers. MaleDriver FemaleDriver 1.3 -0.3 1.3 0.6 0.9 1.1 2.1 0.7 0.7 1.1 1.3 1.2 3 0.1 1.3 0.9 0.6 0.5 2.1 0.5 (a) Use a .01 level of significance for any hypothesis tests. Data consistent with summary quantities appearing in the paper are given in the table. The measurements represent the difference between the observed vehicle speed and the posted speed limit (in miles per hour) for a sample of male teenage drivers and a sample of female teenage drivers. (Use ?males − ?females. Round your test statistic to two decimal places. Round your degrees of freedom down to the nearest whole number. Round your p-value to three decimal places.) t = df =…
A paper investigated the driving behavior of teenagers by observing their vehicles as they left a high school parking lot and then again at a site approximately 1 2 mile from the school. Assume that it is reasonable to regard the teen drivers in this study as representative of the population of teen drivers. MaleDriver FemaleDriver 1.4 -0.2 1.2 0.5 0.9 1.1 2.1 0.7 0.7 1.1 1.3 1.2 3 0.1 1.3 0.9 0.6 0.5 2.1 0.5 (a) Use a .01 level of significance for any hypothesis tests. Data consistent with summary quantities appearing in the paper are given in the table. The measurements represent the difference between the observed vehicle speed and the posted speed limit (in miles per hour) for a sample of male teenage drivers and a sample of female teenage drivers. (Use ?males − ?females. Round your test statistic to two decimal places. Round your degrees of freedom down to the nearest whole number. Round your p-value to three decimal places.) t = df =…
6. In the book Business Research Methods (5th ed.), Donald R. Cooper and C. William Emory discuss studying the relationship between on-the-job accidents and smoking. Cooper and Emory describe the study as follows: Suppose a manager implementing a smoke-free workplace policy is interested in whether smoking affects worker accidents. Since the company has complete reports of on-the-job accidents, she draws a sample of names of workers who were involved in accidents during the last year. A similar sample from among workers who had no reported accidents in the last year is drawn. She interviews members of both groups to determine if they are smokers or not. The sample results are given in the following table.
A company institutes an exercise break for its workers to see if it will improve job satisfaction, as measured by a questionnaire that assesses workers' satisfaction before and after the implementation of the program. Using an appropriate nonparametric procedure and α=0.05, does the data indicate that that an exercise break for the workers improved job satisfaction? Worker Number 1 2 3 4 5 6 7 8 9 10Before 36 28 30 46 26 26 24 16 15 28After 33 36 49 41 36 40 39 21 20 37 1. Using the Normal approximation, find the value of the test statistic. 2 .Find the P-value for the test statistic. 3. Choose the correct conclusion below. A. The after exercise program job satisfaction scores are systematically higher when compared to the before exercise program job satisfaction scores. B. The after exercise program job satisfaction scores seem to be systematically equal when compared to the…
Aronson and Mills (1959) conducted an experiment to see whether people's liking for a group is influenced by the severity of initiation. They reasoned that when people willingly undergo a severe initiation to become members of a group, they are motivated to think that the group membership must be worthwhile. Otherwise, they would experience cognitive dissonance: Why put up with severe initiation for the sake of a group membership that is worthless? In their experiment, participants were randomly assigned to one of three treatment groups: Group 1 (control) had no initiation. Group 2 (mild) had a mildly embarrassing initiation (reading words related to sex out loud). Group 3 (severe) had a severely embarrassing initiation (reading sexually explicit words and obscene words out loud). After the initiation, each person listened to a standard tape-recorded discussion among the group that they would now supposedly be invited to join; this was made up made to be as dull and banal as possible.…
2) A research team was interested in whether life satisfaction differed between older (> 65 years old) and younger (18 – 35 year old) adults. Ten individuals of each group were surveyed. The maximum possible score was 60 (high level of satisfaction) and the minimum possible scores was 0 (no satisfaction with life). older adults: 45 38 52 48 25 39 51 46 55 46 younger adults: 34 22 15 27 37 41 24 19 26 36 a) What are the null and alternative hypotheses for this study? Is this a one-tailed or a two-tailed test? b) What test should the research team use to test its hypothesis? Justify your answer. c) Based in your answers to Parts A and B above, calculate your appropriate test statistic. Please show all work. d) Assume that the research team set α to 0.01 during the design phase of their study. - Calculate the degrees of freedom. Please show all of your work. - State your final conclusion for this study based on α and the degrees of freedom. Please justify your answer.
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Weinstein, McDermott, and Roediger (2010) report that students who were given questions to be answered while studying new material had better scores when tested on the material compared to students who were simply given an opportunity to reread the material. In a similar study, a group of students from a large psychology class were given questions to be answered while studying for the final exam. The overall average for the exam was m = 73.4 but the n = 16 students who answered questions had a mean of M =78.3 with a standard deviation of s = 8.4. Use a two-tailed test with a = .01 to determine whether answering ques- tions while studying produced significantly higher exam scores.
In studies examining the effect of humor on interpersonal attractions, McGee and Shevlin (2009) found that an individual’s sense of humor had a significant effect on how the individual was perceived by others. In one part of the study, female college students were given brief descriptions of a potential romantic partner. The fictitious male was described positively as being single and ambitious and having good job prospects. For one group of participants, the description also said that he had a great sense of humor. For another group, it said that he has no sense of humor. After reading the description, each participant was asked to rate the attractiveness of the man on a seven-point scale from 1 (very unattractive) to 7 (very attractive). A score of 4 indicates a neutral rating. The females who read the “great sense of humor” description gave the potential partner an average attractiveness score of M = 4.53 with a standard deviation of s = 1.04. If the sample consisted of n = 16…
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Which of these is a manifestation of null hypothesis? a. As temperature increases so too will the level of aggression b. Older adults will have worse memories than younger adults c. There will be no relationship between caffeine consumption and performance d. There will be a significant difference between group 1 and group 2
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