dstv nov Xdstv no x b soccer p x> soccer p X> panaitol xContent Xвы 2119877 хвы 1981047 х3 Settings xMicroso x +->Ô https://learn-eu-central-1-prod-fleet01-xythos.learn.cloudflare.blackboardcdn.com/5e8cacc75e657/2119877?X-Blackb..+1...+(B Page view A Read aloud V DrawE HighlightO Eraseof 1TUTORIAL 2The following data give the experience (in years) and monthly salaries (in hundreds ofdollars) of nine randomly selected secretaries.Experience 14 3Monthly5649| 1851662293743|3560| 673260salarya) Find the least squares regression line.b) Construct a 98% confidence interval for B1.c) Test at the 2.5% significance level whether Bi is greater than zero.d) Interpret the meaning of the values of Bo and Bị calculated in part a.e) Plot the scatter diagram and the regression line.f) Calculate r and r², and explain what they mean.g) Predict the monthly salary for a driver with 10 years of experience.h) Compute the standard deviation of errors.i) Construct a 90% confidence interval for B,.j) Test at the 5% significance level whether B1 is negative.k) Compute the linear correlation coefficient.I) Using a = 0.05, test whether p is different from zero.m) Construct a 90% confidence interval for the mean monthly salary of allsecretaries with 10 years of experience.www.youtube.com • 3mn) Construct a 90% prediction interval for the monthly salary of a randomlyJoin us LIVE for a new message from Pasto..selected secretary with 10 years of experience.Elevation Worship is live12:40 PMP Type here to searchWA O A 4)4/25/2021

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The following data give the experience (in years) and monthly salaries (in hundreds of dollars) of nine randomly selected secretaries. Experience 14 3 5 6 4 9| 18 5 16 Monthly salary 62 29 37 43 | 60 67 32 | 60 35 a) Find the least squares regression line. b) Construct a 98% confidence interval for B.. cl Test at the 2 56 eignificance oreater than Tero

The following data give the experience (in years) and monthly salaries (in hundreds of dollars) of nine randomly selected secretaries. Experience 14 3 5 6 4 9| 18 5 16 Monthly salary 62 29 37 43 | 60 67 32 | 60 35 a) Find the least squares regression line. b) Construct a 98% confidence interval for B.. cl Test at the 2 56 eignificance oreater than Tero

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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I need help with these questions. I did part A with the regressional analysis and got 92.5% for the coefficient determination.
A professor of women's studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stress-free environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained. High stress 20 23 18 19 22 Relatively stress free 26 31 25 26 30 Assume you are evaluating H0 using the t test. The df for determining tcrit are _________.
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The basketball coach at a local college believes that his team scores more points at home games when more people show up. Below is a list of all home games last year with scores and corresponding attendance. Score Attendance Score Attendance 54 380 67 410 57 350 78 215 59 320 67 113 80 478 56 250 82 451 85 450 75 250 101 489 73 489 99 472 53 451 4. A. What is the critical t-score for a two-tailed test with a a = 0.05? tcrit B. Is this correlation significant based on the t-scores?
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In certain food experiment, a nutritionist compared two types of baby foods A and B. He claims that Food B is more likely to increase children’s weight than Food A. The following results of increase in weight (lbs) we observed in 8 children as follows Food A 44 50 44 50 47 42 50 53 Food B 52 55 52 53 50 54 54 53 Use the data and SPSS to answer the following questions (Paste the SPSS output as evidence of your answers) Find the standardized t test Find the P-value Decide whether to reject or fail to reject the null hypothesis. Interpret the decision in the context of the original claim
Medical research has shown that repeated wrist extensions beyond 20 degrees increase the risk of wrist and hand injuries. Each of 24 students at a university used a proposed new computer mouse design, and while using the mouse, each student's wrist extension was recorded. Data consistent with summary values given in a paper are given here. 27 22 29 24 27 27 25 25 24 24 24 25 28 25 24 28 27 26 31 25 28 27 27 25 USE SALT (a) Use these data to estimate the mean wrist extension for people using this new mouse design using a 90% confidence interval. (Round your answers to three decimal places.)
Subject Extroversion Neuroticism 1 43 49 2 46 53 3 48 67 4 48 57 5 48 56 6 50 48 7 51 60 8 51 41 9 53 51 10 58 47 11 62 41 12 63 51 13 63 30 14 63 28 15 67 55 16 67 47 17 67 39 7. What is the standard error of the correlation coefficient for the association of extroversion and neuroticism in personalities.xls? 8. Carry out a formal t-test for the association between extroversion and neuroticism in personalities.xls. H0: The population correlation coefficient is 0. HA: The population correlation coefficient is not 0. What is the value of the t-statistic corresponding to this test? (Report the absolute value. The t-distribution is symmetric, thus it is easier to compare the absolute value of the t-statistic with the positive values in statistical table C). 9. Carry out a formal t-test for the association between extroversion and neuroticism in personalities.xls. H0: The population correlation coefficient is 0. HA: The population correlation coefficient is not 0. What is the critical…
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Results on seat belt usage from the 2003 Youth Risk Behavior Survey were published in a USA Snapshot on January 13, 2005. The following table outlines the results from the high school students who were surveyed in the state of Nebraska. They were asked whether or not they rarely or never wear seat belts when riding in someone else's car. Using ? = .05, does this sample present sufficient evidence to reject the hypothesis that gender is independent of seat belt usage? Female Male Rarely or never use seat belt 206 323 Uses seat belt 1220 1157 (a) Find the test statistic. (Give your answer correct to two decimal places.)(ii) Find the p-value. (Give your answer bounds exactly.) ______< p < ________
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2. A researcher had rats engage in a lever-press task for either a small, medium, or larger reward. The number of lever presses was the dependent variable. The data were as follows: Reward Size Small Medium Large 1 4 6 4 3 5 1 4 4 2 5 T = 13 SS = 2.75 T= 6 T= 20 SS = 9 SS = 2 EX2 = 165 a. Do the data indicate that reward size had a significant impact on lever-pressing? Use the hypothesis testing steps & p = .05. Compute any necessary post-hoc tests. b. Compute eta-squared to measure the effect size.