True or False: Based on the Shapiro-Wilks normality test, the variable Pr passes the normality assumption. > head(Student_data_BUS)X Record. Number Age Sex Aer Smk Caf Pr Rct Starting_Sal HRs.per.week Major1 120 11 72 12558 FIN18162FIN21155FIN181 261ACCT58ACCT18 1 16 1857 ACCT223 3445566ΟΛ123456तत्त1ANANतत12102222221 22 80 1502 60 1002 60 1602 53 1502 81 140387234040739988401663958039982

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Answered: > head(Student_data_BUS) X Record.…

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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Let a be a random variable representing the percentage of protein content for early bloom alfalfa hay. The average percentage protein content of such early bloom alfalfa should be u = 17.2%. A farmer's co-op is thinking of buying a large amount of baled hay but suspects that the hay is from a later summer cutting with lower protein content. A small amount of hay was removed from each bale of a random sample of 50 bales. The average protein content from the samples was determined by a local agricultural college to be -15.8% with a sample standard deviation of S = 5.3%- At a = .05, does this hay have lower average protein content than the early bloom alfalfa?
Executives of a supermarket chain are interested in the amount of time that customers spend in the stores during shopping trips. The executives hire a statistical consultant and ask her to determine the mean shopping time, u, of customers at the supermarkets. The consultant will collect a random sample of shopping times at the supermarkets and use the mean of these shopping times to estimate u. Assuming that the standard deviation of the population of shopping times at the supermarkets is 27 minutes, what is the minimum sample size she must collect in order for her to be 99% confident that her estimate is within 5 minutes of u? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.) ?
The cross-tabulation data given below represent the number of males and females in a work group who feel overstressed and those who don't. Complete parts a through d below. Overstressed? Female Male No Yes 10 6 5 11 a. Write the hypotheses for the chi-square test for independence. Ho gender and overstress are independent H₁ gender and overstress are dependent b. Find the expected frequencies. Overstressed? Female Male Grand Total No 7.5 7.5 15 Yes 8.5 8.5 17 Grand Total 16 16 32 (Type integers or decimals rounded to two decimal places as needed.) c. Compute the chi-square statistic 3.14 (Type an integer or decimal rounded to two decimal places as needed.) d. Find the chi-square critical value and p-value and draw a conclusion using a level of significance of 0.05. Find the chi-square critical value (Round to three decimal places as needed.) ad
What does it mean when the null hypothesis for Hartley’s F-max test is rejected? A.The two samples have similar variances. The independent samples t-test assumption of homogeneity of variance has been met. B.The two samples have similar variances. The independent samples t-test assumption of homogeneity of variance has been violated. C.The two samples have very different variances. The independent samples t-test assumption of homogeneity of variance has been met. D.The two samples have very different variances. The independent samples t-test assumption of homogeneity of variance has been violated.
9th grade 10th grade 11th grade 12th grade 6 10 17 15 9 12 8 16 6 11 11 12 7 11 14 12 7 14 15 12 find the critical value for F (F crit) with a standard deviation .05
Using the unemployment data provided, investigate the association between the male unemployment rate in 2007 and 2010 for a sample of 52 countries. Complete parts (a) through (4). m Click the icon to view the data table. OC The plot of the residuals against x tends to cluster as x increases, which is a possible violation of the Linearity Conditon. The Normal probability plot indicates that the Normal Population Assumption is satisfied. OD. The plot of the residuals againat x shows no patten, which satisfes the conditions for linear regression. The Normal probability plot indicates that the Nomal Probability Assumption is violated. c) Test an appropriate hypothesis using a- 0,05 to determine it the association is signiftcant. Choose the corect nul and altemative hypotheses. OA Ha: 0 OB. Ho: lo " 0 HA P0 or l 0 O C. Ho Po-0 OD. Ho: la =P HA Po
A directional hypothesis test has a critical region that consists of the extreme ends of both the left and right side of the t distribution. OTrue O False
Use the Shapiro-Wilk test to check the normality assumption for the variable Pr. According to this test, does the variable Pr meet the normality assumption? p-value = 6.954e-07 Yes, because the P-value of the Shapiro test is less than 0.05. Yes, because the P-value of the Shapiro test is greater than 0.05. No, because the P-value of the Shapiro test is less than 0.05. No, because the P-value of the Shapiro test is greater than 0.05.
Which of the following tests is used to test if the homogeneity of variance assumption is met? Tukey HSD 99 x 99 Factorial ANOVA Levene's test Post-hoc test
J sampled 1000 people, and determined whether they are a teacher or not and their gender. J found the information in the following table. Is an Teacher Isn't an Teacher Male 42 449 Female 5 488 Other 1 15 Perform a chi-squared test of independence to test the null hypothesis that gender and status as an teacher are independent versus the alternative that they are dependent. What is the p-value for this test? What are the steps to come to this conclusion?
Suppose that x and y are two variables of a population and that the assumptions for regression inferences are met with x as the predictor variable and y as the response variable. a. What statistic is used to estimate the slope of the population regression line? b. What statistic is used to estimate the y-intercept of the population regression line? c. What statistic is used to estimate the common conditional standard deviation of the response variable corresponding to fixed values of the predictor variable?

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