Emma's On-the-Go, a large convenience store, has to decide where in the store to put its magazine rack. The manager at Emma's experiments with a selectionof different locations, choosing a sample of days at each location. Each day, the manager records the amount of money brought in from the sale of magazines.It's possible to test whether there is a difference in the mean daily sales for the different locations by doing a one-way, independent-samples ANOVA test. Thevariable of interest is the daily sales, in dollars, from magazines at Emma's. In the ANOVA test, the "groups" are the different locations, and the "samples" arethe daily magazine sales actually examined by the manager.(a) The following ANOVA table gives a summary of such an ANOVA test. Fill in the missing cell in the table (rounded to two decimal places).Degrees offreedomSource ofSum ofMean square F statisticvariationsquaresTreatments(betweengroups)43209.01802.25Error21594,380.7438.98(withingroups)Total21997,589.71(b) How many days total were sampled for the manager's experiment?(c) For the ANOVA test, it is assumed that the variance is the same for each population of daily sales (that is, for the populations of daily sales for eachlocation). What is an unbiased estimate of this common population variance based on the sample variances?(d) What is the p-value corresponding to the F statistic for the ANOVA test? Round your answer to at least three decimal places.(e) Can we conclude, using the 0.05 level of significance, that there is a difference in the mean daily sales among the different locations?O YesO No

Answered: Image /qna-images/answer/965de971-c493-45fb-aed7-b1442e91450c.jpg

Answered: (a) The following ANOVA table gives a…

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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Serial Killers: Everything Up to One-Way Between-Groups ANOVA What analysis could be used to see if there are significant differences in the mean numbers of victims of serial killers in Austrailia, Canada, the United States, and the United Kingdom? one-way between-groups ANOVA In which of the following four categories does this situation fall? a. only scale variables b. nominal independent variables, scale dependent variable c. only nominal variables d. any ordinal variables (that cannot be treated as nominal)
In a survey of women in a certain country (ages 20 - 29), the mean height was 63.5 inches with a standard deviation of 2.94 inches. Answer the following questions about the specified normal distribution. (a) What height represents the 95th percentile? (b) What height represents the first quartile? Click to view page 1 of the table. Click to view page 2 of the table. (2) The height that represents the 95th percentile is inches (Round to two decimal places as needed.) (b) The height that represents the first quartile is inches (Round to two decimal places as needed.)
A One-Way ANOVA yields the following results. Should the F-test be followed up by a post-hoc analysis? Explain your decision. (Use a = .05).
For the following summary table for a one-way ANOVA, fill in the missing items (indicated by asterisks), identify the null and alternative hypotheses, then use the 0.05 level of significance in reaching a conclusion regarding the null hypothesis. Variation Source Sum of Squares Degrees of Freedom Mean Square F Treatments 6752.0 2 3376.0 *** Error 30178.0 *** *** Total 36930.0 29
a. Use a = 0.10 to test for a statistically significantly difference between the population means for first- and fourth-round scores. What is the p-value? t-value (to 3 decimals) Degrees of freedom p-value is greater than 0.20 What is your conclusion? There is no significant difference between the mean scores for the first and final rounds. b. What is the point estimate of the difference between the two population means? (to 2 decimals) For which round is the population mean score lower? First round c. What is the margin of error for a 90% confidence interval estimate for the difference between the population means? (to 3 decimals) Could this confidence interval have been used to test the hypothesis in part (a)? Yes Explain. Use the point of the difference between the two population means and add and subtract this MOE. If zero is in the interval the difference is not statistically significant. If zero is not in the interval the difference is statistically significant.
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The following ANOVA table, based on information obtained for three samples selected from three independent populations that are normally distributed with equal variances, has a few missing values. a. Find the missing values and complete the ANOVA table. Round your answers for the sum of squares and the mean square to four decimal places. Round your answer for F to two decimal places. Source of Variation Degrees of Freedom Sum of Squares Mean Square Value of the Test Statistic Between 2 19.2813 Within 89.3677 i F= i Total 12 b. Using a = 0.01, what is your conclusion for the test with the null hypothesis that the means of the three populations are allequal against the alternative hypothesis that the means of the three populations are not all equal? The means are the same the same eTextbook a not the same
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"What i v nighest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" In a recent year, 1125 respondents answered both questions. The summary statistics are given in the chart below. (The sample data consist of the times, in hours per week, that were given by the respondents.) Sample Sample Sample size Groups mean variance Less than h.s. 257 43.1 110.1 High school 292 44.2 84.9 Bachelor's 294 42.7 105.8 Graduate 282 43.6 100.8 Send data to calculator Send data to Excel To decide if there are any differences in the mean hours per week worked by these different groups, we can perform a one-way, independent-samples ANOVA test. Such a test uses the following statistic. Variation between the samples F = Variation within the samples For the data from the survey, F - 1.22. (a) Give the p-value corresponding to this value of the F statistic. Round your answer to at least three decimal places. (b) From…

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