Wesley then performs a significance test.First, he performs 100 simulations. For eachsimulation, he randomly reorganizes thesubjects into two groups, A and B, of size 25. Inthe simulations, group A plays the role of thetreatment group and group B plays the role ofthe control group.After each simulation, he subtracts the averagefor group B from the average for group A. Thedistribution of the differences for all 100simulations is shown in the histogram.30282624222012Group A avg. - Group B avg.In the original experiment, the average for thetreatment group was 0.6 higher than theaverage for the control group.Based on the 100 simulations, are the results ofthe experiment significant at the 5% level?yesnoNumber of simulations[-1.9, -1.4)(-1.4, -0.9)[-0.9, -0.4)(-0.4, 0.1)[0.1, 0.6)(0.6, 1.1)[1.1, 1.6)[1.6, 2.1)[2.1, 2.6)[2.6, 3.1)[3.1, 3.6)

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Answered: Wesley then performs a significance…

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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We have 2 flavors of cough syrup - PLAIN and SWEET. Taste tests are conducted with tasters rating the syrup on a 10 point scale with 1 as bad and 10 as excellent. Data are: PLAIN:7,7,6,5,6,8,5,4,6,8,9,10,5,6,4,8,8,8,9,7,8,9,6,7,8,6,7,8,5,6,5,6,7,8,9,9 SWEET: 1,6,7,7,8,5,4,4,6,9,9,9,8,7,8,7,8,5,10,6,6,7,8,8,8,5,6,4,5,6,7,8,3,4,5 Decide what approach would fit here, conduct your analysis, and draw conclusions.
A social psychologist wanted to determine whether attitudes of men toward abortion were different in rural and urban areas. He prepared a questionnaire and administered it to a group of city dwellers and a group of country dwellers. Each city man was matched with a country man on age, income, and education. High scores indicate positive attitudes toward abortion. Here are the questionnaire scores. Rural Men Urban Men 22 25 19 23 18 20 17 18 15 12 10 9 6 4 4 3 a. What statistical method should be used and why? b. Calculate a 95% confidence interval about the difference in the two populations. c. Use the CI to test the null hypothesis that rural and urban men have identical attitudes toward abortion.
The data in the table is the number of absences for 7 students and their corresponding grade. Number of Absences Grade0 5.51 52 4.53 3.55 37 2.58 2 Step 2 of 3: Determine if r is statistically significant at the 0.01 level.
A statistics professor would like to build a model relating student scores on the first test to the scores on the second test. The test scores from a random sample of 21 students who have previously taken the course are given in the table. Student Test Grade 1 Test Grade 21 42 812 51 743 88 624 99 575 54 726 66 737 87 638 99 579 97 5810 89 6311 42 7712 71 6313 96 5514 56 7615 75 6916 57 7017 62 7518 89 6319 50 7220 56 7221 89 57Step 1 of 2 : Using statistical software, estimate the parameters of the modelSecond Test Grade=β0+β1(First Test Grade)+εi.Enter a negative estimate as a negative number in the regression model. Round your answers to 4 decimal places, if necessary.
A psychology professor assigns letter grades on a test according to the following scheme. A: Top 11%11% of scores B: Scores below the top 11%11% and above the bottom 61%61% C: Scores below the top 39%39% and above the bottom 16%16% D: Scores below the top 84%84% and above the bottom 6%6% F: Bottom 6%6% of scores Scores on the test are normally distributed with a mean of 81.881.8 and a standard deviation of 7.87.8. Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary.
An English professor assigns letter grades on a test according to the following scheme. A: Top 13%13% of scores B: Scores below the top 13%13% and above the bottom 61%61% C: Scores below the top 39%39% and above the bottom 20%20% D: Scores below the top 80%80% and above the bottom 10%10% F: Bottom 10%10% of scores Scores on the test are normally distributed with a mean of 72.872.8 and a standard deviation of 7.37.3. Find the numerical limits for a D grade. Round your answers to the nearest whole number, if necessary.
A small university was looking to recruit students for their golf program during Freshman orientation. Each organization would be allotted 10 minutes to give a small presentation about their program. The golf coach wants to discuss the programs golf over the past five years during his presentation. To do this, he plans to take samples of the scores from both practice rounds and games. He has recruited students from Statistics class to help him determine which statistic would be best to use to display the scores. The students have narrowed it down to four different statistics. For each statistic, the coach has taken 100 random samples of golf scores over the past five years and the statistic is calculated for each sample. Suppose the value for the population parameter he is trying to estimate is a score of 75. ALL GRAPHS ARE IN THE ATTACHED PICTURE!! THANK YOU!! a) For each graph above, identify whether the statistic appears to have a biased or unbiased estimator of the population…
K Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sample of 30 students. The scores are shown below. 43 51 11 90 77 36 64 37 42 72 54 62 36 75 51 72 37 28 38 61 47 63 36 41 22 37 51 46 85 13 To find the 10% trimmed mean of a data set, order the data, delete the lowest 10% of the entries and the highest 10% of the entries, and find the mean of the remaining entries. Complete parts (a) through (c). (a) Find the 10% trimmed mean for the data. The 10% trimmed mean is (Round to the nearest tenth as needed.)
A college football coach was interested in whether the college's strength development class increased his players' maximum lift (in pounds) on the bench press exercise. He asked four of his players to participate in a study. The amount of weight they could each lift was recorded before they took the strength development class. After completing the class, the amount of weight they could each lift was again measured. What is being tested in this situation and what distribution will be used to conduct the test? Group of answer choices a.Two independent means, normal distribution. b.Single population mean, use the t-distribution. c.Single population mean, use the normal distribution. d.Two independent proportions, use the normal distribution. e.Two independent means, use the Student’s-t distribution.
The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
Caden then performs a significance test. First, he performs 100 simulations. For each simulation, he randomly reorganizes the subjects into two groups, A and B, of size 10. In the simulations, group A plays the role of the treatment group and group B plays the role of the control group. After each simulation, he subtracts the average for group B from the average for group A. The distribution of the differences for all 100 simulations is shown in the histogram. 30 28 26 24 22 12 10 6. 2 Group A avg. - Group B avg. In the original experiment, the average for the treatment group was 0.8 higher than the average for the control group. Based on the 100 simulations, are the results of the experiment significant at the 5% level? yes no Number of simulations [-2.7, -2.2) [-2.2, -1.7) [-1.7, -1.2) [-1.2, -0.7) [-0.7, -0.2) [-0.2, 0.3) [0.3, 0.8) [0.8, 1.3) [1.3, 1.8) [1.8, 2.3) [2.3, 2.8)
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