330CHAPTER 10 | The t Test for Two Independent Samplesb. C7. Research results suggest a relationship between theTV viewing habits of 5-year-old children and theirfuture performance in high school. For example,Anderson, Huston, Wright, and Collins (1998) reportthat high school students who regularly watchedSesame Street as children had better grades in highschool than their peers who did not watch SesameStreet. Suppose that a researcher intends to examinethis phenomenon using a sample of 20 high schoolstudents.с.9. Doeресing(20theThe researcher first surveys the students' parents toobtain information on the family's TV viewing habitsduring the time that the students were 5 years old. Basedon the survey results, the researcher selects a sampleof n = 10 students with a history of watching "SesameStreet" and a sample of n = 10 students who did notwatch the program. The average high school grade isrecorded for each student and the data are as follows:adcaft-AltheonshS =theсаAverage High School GradeafWatched SesameDid Not Watch Sesamea-StreetStreet869990798797898391948286b978983819892859210. ILn = 10n = 10M = 93tiM = 85SS = 200SS = 160athUse an independent-measures t test with a = .01to determine whether there is a significant differencebetween the two types of high school student.th

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Description: 330CHAPTER 10 | The t Test for Two Independent Samplesb. C7. Research results suggest a relationship between theTV viewing habits of 5-year-old children and theirfuture performance in high school. For example,Anderson, Huston, Wright, and Collins (1

Given information: The data represents the descriptive statistics for the average high school grade…

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Research results suggest a relationship between the TV viewing habits of 5-year-old children and their future performance in high school. For example, Anderson, Huston, Wright, and Collins (1998) repor that high school students who regularly watched Sesame Street as children had better grades in high wotch Sesame

Research results suggest a relationship between the TV viewing habits of 5-year-old children and their future performance in high school. For example, Anderson, Huston, Wright, and Collins (1998) repor that high school students who regularly watched Sesame Street as children had better grades in high wotch Sesame

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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Some researchers have noted that adolescents who spend a lot of time playing video or computer games are at greater risk for depression and violence. This is an example of: a. an observational study with lurking variables that may explain the association. b. a paired data experiment, because we are studying both aggression and game playing. c. a single-blind experiment, because the subjects knew they were playing games. d. a valid conclusion, because more time yields more aggression is a positive association.
Exercise is known to produce positive psychological effects. Interestingly, not all exercise is equally effective. It turns out that exercising in a natural environment (e.g., jogging in the woods) produces better psychological outcomes than exercising in urban environments or in homes (Mackay & Neill, 2010). Suppose that a sports psychologist is interested in testing whether there is a difference between exercise in nature and exercise in the lab with respect to post-exercise anxiety levels. The researcher recruits n 5 7 participants who exercise in the lab and exercise on a nature trail. The data below represent the anxiety scores that were measured after each exercise session. Treat the data as if the scores are from an independent-measures study using two separate samples, each with n 5 7 participants. Compute the pooled variance, the estimated standard error for the mean difference, and the independent-measures t statistic. Using a 5 .05, is there a significant difference…
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The authors of a paper on perceptions of video games carried out an experiment to determine if restrictive labels on video games actually increased the attractiveness of the game for young game players. Participants read a description of a new video game and were asked how much they wanted to play the game. The description also included an age rating. Some participants read the description with an age-restrictive label of 7+, indicating that the game was not appropriate for children under the age of 7. Others read the same description, but with an age-restrictive label of 12+, 16+, or 18+. The following data for 12- to 13-year-old boys are consistent with summary statistics given in the paper. (The sample sizes in the actual experiment were larger.) For purposes of this exercise, you can assume that the boys were assigned at random to one of the four age label treatments (7+, 12+, 16+, and 18+). Data shown are the boys' ratings of how much they wanted to play the game on a scale of 1…
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24) Some research has shown that swearing can help reduce ratings of pain (Stephens, Atkins, & Kingston, 2009). In one such study, each participant was asked to plunge a hand into icy water and keep it there as long as the pain would allow. In one condition, the participants repeated their favorite curse words while their hands were in the water. In the other condition, the participants repeated a neutral word. In addition to lowering the participants’ perception of pain, swearing also increased the amount of time they were able to tolerate the pain. Data similar to the results obtained in their study are shown in the following table. Amount of Time (in Seconds) Participant Swear Words Neutral Words 1 94 59 2 70 61 3 52 47 4 83 60 5 46 35 6 117 92 7 69 53 8 39 30 9 51 56 10 73 61 Do these data indicate a significant difference in pain tolerance between the two conditions?…
A group of cognitive psychologists were interested in testing whether learning in the testing environment improves memory retention (i.e, test scores) in a scuba diving class. To test this, the experimenters manipulated learning location such that half learned the material in a pool. in addition, the experimenters manipulated testing location such that half. of the class were tested in the classroom and half were tested in the pool. thus, a 2X2 design was used. Which statistical test should be used? a. one way between subjects ANOVA b. one way repeated measures ANOVA c two way between subjects ANOVA d. none of these options
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The authors of a paper on perceptions of video games carried out an experiment to determine if restrictive labels on video games actually increased the attractiveness of the game for young game players. Participants read a description of a new video game and were asked how much they wanted to play the game. The description also included an age rating. Some participants read the description with an age-restrictive label of 7+, indicating that the game was not appropriate for children under the age of 7. Others read the same description, but with an age-restrictive label of 12+, 16+, or 18+. The following data for 12- to 13-year-old boys are consistent with summary statistics given in the paper. (The sample sizes in the actual experiment were larger.) For purposes of this exercise, you can assume that the boys were assigned at random to one of the four age label treatments (7+, 12+, 16+, and 18+). Data shown are the boys' ratings of how much they wanted to play the game on a scale of 1…
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