10. Gravetter/Wallnau/Forzano, Essentials - Chapter 9 - End-of-chapter question 15Weinstein, McDermott, and Roediger (2010) report that students who were given questions to be answered while studying new material had betterscores when tested on the material compared to students who were simply given an opportunity to reread the material. In a similar study, aninstructor in a large psychology class gave one group of students questions to be answered while studying for the final exam. The overall average forthe exam was u =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. For thisstudy, did answering questions while studying produce significantly higher exam scores? Use a one-tailed test with a = .01 and the Distributions toolto help. (Round your answers to three decimal places, when needed.)t DistributionDegrees of Freedom = 21-3.0-2.0-1.00.01.02.03.0SM%3Dt-critical%3D Based on the sample, has there been a significant change in the average level of anxiety since the 1950s? Use a two-tailed test with a = .01.Accept the null hypothesis, and conclude that there has been no significant change in the level of anxiety.Reject the null hypothesis, and conclude that there has been a significant change in the level of anxiety.Reject the null hypothesis, and conclude that there has been no significant change in the level of anxiety.Accept the null hypothesis, and conclude that there has been a significant change in the level of anxiety.Make a 90% confidence interval estimate of today's population mean level of anxiety:22.300 to 24.30020.353 to 26.24721.547 to 25.053Complete the sentence that demonstrates how the outcome of the hypothesis test and the confidence interval would appear in a research report.The dataa significant change in the level of anxiety,

State the given values. State the Hypothesis

10. Gravetter/Wallnau/Forzano, Essentials - Chapter 9 - End-of-chapter question 15 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, an instructor in a large psychology class gave one group of students questions to be answered while studying for the final exam. The overall average for the exam was p = 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. For this study, did answering questions while studying produce significantly higher exam scores? Use a one-tailed test with a = .01 and the Distributions tool to help. (Round your answers to three decimal places, when needed.) t Distribution Degrees of Freedom = 21 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 SM t-critical t

10. Gravetter/Wallnau/Forzano, Essentials - Chapter 9 - End-of-chapter question 15 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, an instructor in a large psychology class gave one group of students questions to be answered while studying for the final exam. The overall average for the exam was p = 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. For this study, did answering questions while studying produce significantly higher exam scores? Use a one-tailed test with a = .01 and the Distributions tool to help. (Round your answers to three decimal places, when needed.) t Distribution Degrees of Freedom = 21 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 SM t-critical t

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Motivational speakers want to be perceived as trustworthy. One hypothesis is that speakers who exhibit immediacy behaviors such as making eye contact, smiling and leaning forward might be perceived as more trustworthy than those who do not engage in these behaviors. To test this hypothesis, a psychologist obtained data from 26 participants. For people in a non-immediacy group, the speaker did not engage in any immediacy behaviors. For the immediacy group, however, the speaker made eye contact, smiled and leaned forward while giving a speech. After the speech, participants rated the speaker on a scale of trustworthiness ranging from 1 (not at all trustworthy) to 9 (highly trustworthy). The following data were obtained. Test whether the immediacy behaviors of the speaker affect trustworthiness rating. No immediacy behavior Immediacy behavior 4 4 7 4 5 3 6 5 3 5 9 8 4 6 8 7 6 3 8 6 7 5 7 8 7 6…
A market research company asked 9 people to evaluate a brand of tablet computer, Brand A, usinga questionnaire. The questionnaire scores are given in TABLE 1.TABLE 1Brand A 8.00 8.02 8.02 8.04. 8.04 8.04 8.07 8.10. 8.11 Another brand of tablet computer, Brand B, was evaluated and given scores with the informationas seen in TABLE 2.TABLE 2Information. Brand B. Minimum (min) 8.04First Quartile (Q1) 8.06Median (Q2) 8.07Third Quartile (Q3) 8.08Maximum (max) 8.10 a) Construct a boxplot for scores of Brand A and label it accordingly. b) Determine the interquartile range (IQR) for both brands.c) According to the IQRs in (b), which brand's scores were more varied in the evaluation? Why?
In this same passage, is it explanatory variable or response variable?
A team of researchers is interested in the effect on physical health of writing about thoughts and feelings associated with traumatic life events (Expressive Writing). The researchers recruit 32 undergraduate students to take part in the study and randomly assign them to be in an expressive Writing Croup or a Control Group. Students in the expressive writing group are instructed to write four 20 - minute essays over four consecutive days about their most traumatic life experiences. Students in the control group write four 20 – minute essays over consecutive days describing their plans for that day. One week later, the researchers ask the students to rate their overall level of physical health (on a scale 0 = very poor health to 100 = perfect health). EWG: 75, 86, 77, 91, 68, 74, 62, 93, 82, 79, 94, 56, 79, 86, 90, 97 CWG: 81, 76, 71, 70, 62, 50, 58, 63, 76, 64, 65, 72, 52, 59, 60, 61 Run the analysis using excel and “print” and INCLUDE the t-test output. Include a boxplot of both…
A report described a survey of parents of children under the age of 18. Each person in a representative sample of 838 working fathers and a sample of 595 working mothers was asked if balancing the responsibilities of a job and a family was difficult. It was reported that 437 of the fathers surveyed and 364 of the mothers surveyed said that it was difficult. The two samples were independently selected and were thought to be representative of working fathers and mothers of children under 18 years old. USE SALT Use this information to calculate a 95% confidence interval estimate of the difference between the proportion of working fathers who find balancing work and family difficult, p₁, and this proportion for working mothers, P2. (Use a statistical computer package to calculate the P-value. Use P₁ - P₂. Round your answers to three decimal places.) to Interpret the interval. O There is a 95% chance that the true difference between the proportion of working fathers who find balancing work…
In an early study of the effects of frustration on feelings of hostility, Miller and Bugelski (1948) had a group of boys at a camp rate their attitudes toward two groups (Mexicans and Japanese). The campers then participated in a long, difficult, frustrating testing session that kept them away from their weekly movie. Finally the boys again rated their attitudes towards the minority groups. The scores below represent the number of unfavorable traits attributed to minorities and are similar to those of miller and Bugelski. Participant Before After A 5 6 B 4 4 C 3 5 D 3 4 E 2 4 F 2 3 G 1 3 H 0 2 a. Does the intervening unpleasant task alter attitudes toward the two…
I need guidance on the last question listed at the end of this .... An experiment was conducted to determine if motivational techniques in management significantly affected employee stress levels compared to no intervention. An employee survey was given to three groups: one group under a manager who started using a transformational motivation technique, one group under a manager who began using a transactional motivation technique, and then a control group with no new technique used. Stress levels were self-reported by the employees on 10-point Likert scales (0 – no stress, 1- little stress, 9 – very high stress). The results are shown below. Use alpha = 0.05. Transformational Transactional Control 0 2 6 7 5 5 3 3 8 5 0 9 2 1 5 Null hypothesis: There is no significant difference in stress levels between the three groups. Alternative hypothesis: There is significance difference in stress levels between the three groups. The…
A researcher wants to investigate whether mindfulness training improves ability for employees to notice positive experiences in the workplace, and if this differs by gender and/or disposition. Employees were randomly assigned to one of two groups: no training or a half-day session. Gender was categorized as male or female. Disposition was categorized as follows: optimist, pessimist or realist. Ability to notice positive experiences in the workplace was quantified using a Likert-based ambulatory assessment. A factorial design was used to analyze the data. Question: How many null hypotheses (and thus, F-ratios) are there in this scenario?
Sigall and Ostrove (1975) did an experiment to assess whether the physical attractiveness of a defendant on trial for a crime had an effect on the severity of the sentence given in a mock jury trials. Each of the participants in this study was randomly assigned to one of the following three treatment groups; every participant received a package that described a burglary and gave background information about the accused person. The three treatment groups differed in the type of information that they were given about the accused person’s appearance. Members of Group 1 were showing a photo of an attractive person; members of Group 2 were shown a photograph of an unattractive person; members of Group 3 saw no photograph. Some of their results are described here. Each participant was asked to assign a sentence (in years) to the accused person; the researchers predicted that more attractive persons would receive shorter sentences. a)Prior to assessment of the outcome, the researchers did a…
What would be your decision? A. Reject the null hypothesis. B. do not reject the null hypothesis. C. Check the alternative hypothesis. D. Where is an insufficient data to make a decision.
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…
Below is data from a study examining the effects of two different psychotherapy treatments on self-esteem. Specifically, two different treatment types (treat1 and treat2) were compared to a waiting list control group in terms of increasing self-esteem; the main question concerned whether each separate therapy type was different from no treatment at all. The values shown below are the self-esteem scores for the participants in each group (higher values indicate greater self-esteem). a. What are the null and alternative hypotheses? b. If there are differences between the groups, be specific with respect to which groups differ