Chapter 12 problem #12 Now evaluate the null hypothesis that the population means for all treatments are equal. At asignificance level of a = 0.05, the null hypothesis is. You find thatyouconclude that the direction that the stroller faces influences a child's expressivevocabulary at 36 months.Now you decide to use a t test to test the hypothesis that there is no difference between thegroups. The estimated standard error (SM1 - Mzis 5.13, so the t test statistic isUse the following tool to find the critical regions for a = 0.05.t DistributionDegrees of Freedom= 21-3.0-2.0.2500.5000-1.0.5000.5000.25000.0-0.686 0.000 0.6861.02.03.0tThe critical t-scores (the values for t-scores that separate the tails from the main body of thedistribution, forming the critical regions) areNow use the tool to evaluate the null hypothesis. At a significance level of a = 0.05, the nullhypothesis is. You find that youconclude that the direction thestroller faces influences a child's expressive vocabulary at 36 months.conclusion.When you evaluated the mean difference from the independent-measures study comparing onlytwo samples, the ANOVA and the t test resulted in Suzanne Zeedyk, a developmental psychologist at Dundee University's School of Psychology,conducted a pilot study in which parents started a half-hour walk with their infants in a parent-facing or an away-facing stroller and then switched to the other type of stroller midway. Her resultssuggest that parents talked less to the babies, the babies had higher heart rates, and they wereless likely to fall asleep in away-facing strollers than in parent-facing strollers.You are interested in testing the hypothesis that babies who travel in parent-facing strollers havedifferent expressive vocabularies than babies who travel in away-facing strollers. You randomlyassign 12 newborns to parent-facing strollers and 12 newborns to away-facing strollers. You thentest the babies' expressive vocabularies at age 36 months using the Expressive Vocabulary Test(EVT), which is designed primarily to assess children's expressive vocabulary.The sample means and sums of squares of the scores for each of the groups are presented in thefollowing table.GroupAway-facingParent-facingSample Mean Sum of Squares2,064.591,404.59You decide to use an ANOVA at a = 0.05 to test the null hypothesis that there is no differencebetween the groups. The ANOVA table follows. Calculate the F-ratio and enter it into the table.Within TreatmentsTotalANOVA TableSource of Variation Sum of Squares Degrees of FreedomBetween Treatments1222398.1106.2F DistributionNumerator Degreesof Freedom = 26DenominatorDegrees of Freedom= 26Fcriticaat a = 0.05 isUse the Distributions tool that follows to find Fcriticaat a significance level of a = 0.05, the value ofF that bounds the critical region for the F-ratio test statistic.393.663,469.183,862.840.00.5000.50001.001.0002.003.004.005.00Mean Square F393.66157.696.007.008.00F

Given data: Group Sample Mean Sum of Squares Away-facing 98.1 2064.59 Parent-facing 106.2…

Answered: Now evaluate the null hypothesis that…

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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Problem Set 1.) Around Durham College there are four pizza parlors that make deliveries. A researcher decides to compare how promptly the four parlors deliver. On six randomly chosen nights, she orders a large pepperoni pizza from each parlor, then records the elapsed time until the pizza is delivered to her apartment. Assume that her apartment is approximately the same distance from the four pizza parlors. The following table shows the time (in minutes) for these deliveries. Assume that all assumptions required to apply one-way ANOVA hold true. Pizza Pizza Pizza Hut Papa John Dominoes 20.0 22.1 22.3 23.9 24.0 27.0 26.0 24.1 18.3 20.2 24.0 25.8 22.0 32.0 30.1 29.0 20.8 26.0 28.0 25.0 19.0 24.8 25.8 24.2 Does the mean delivery time the same for each of the four pizza parlor using the 5% significance level? pllou th colving problem Handwrite your solution
QUESTION 3 A business has two types of employees - managers and workers. Managers earn either $100,000 or $200,000 a year. Workers earn either $10,000 or $20,000 a year. The number of male and female managers at each salary level are shown in the first table below. The number of male and female workers at each salary level are shown in the second table below. Managers $100,000 $200,000 Male 80 20 Female 20 30 Workers $10,000 $20,000 Male 30 20 Female 20 80 These tables are converted to row percentages below: Managers $100,000 $200,000 Male 80% 20% Female 40% 60% Workers $10,000 $20,000 Male 60% 40% Female 20% 80% Looking at the data, broken down by type of employee, which of the following best describes the relationship between sex and salary? Group of answer choices- (A) Broken down by employee type, females are more likely to earn a higher salary than males. There is a higher percentage of female managers at the higher salary…
Social Night Problem 2: In the above diagram, on the left, we have some girls and on the right, we have some guys. If there is an edge between a girl and a guy, it means both of them are attracted to each other. Yes, a person can have multiple crushes. In this scenario, what is the maximum number of couples that can result from the above diagram given that nobody wants to end up with someone they don't like? A person would rather stay single than end up with someone they don't like. What matching algorithm are you using for this problem? Show each step of your algorithm precisely.
As discussed in the Mythical Man Month, consider the situation shown below where the time to complete each task of the project was estimated to require 3 workers for 4 months, but in actuality, each task will require 2 months if we only use 3 workers. Theoretically, we could still complete the project on-time, if we could complete the remaining 18 months of work in the remaining 2 months. In addition to our original 3 workers, how many additional workers would be need to hire? Sle (10/n rin Manthe
Question 28 A company manufactures two lines of bathtubs, called model A and model B. Every tub requires a certain amount of steel and zinc; the company has available a total of 25,000 pounds of steel and 6,000 pounds of zinc. Each model A bathtub requires a total of 125 pounds of steel and 20 pounds of zinc, and each yields a profit of $90. Each model B bathtub can be sold for a profit of $70; model B requires 100 pounds of steel and 30 pounds of zinc. Additionally, due to a space constraint the company can stock no more than 150 units of tub model A. Determine the binding constraint(s). Steel Space Steel and Zinc Zinc and Space Steel and Space to
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Question 6 of 16 Ali, the CEO of a manufacturing company, decided to expand the product offering of his business to include the manufacture of a specific model automotive unit. To include this product, his business would incur fixed costs of $365,000 per year and variable costs of $6 per unit. He plans to sell each unit for $88. a. Calculate the number of units he would have to manufacture to break even. Round up to the next whole number b. While manufacturing the unit, he realized that an additional fixed cost of $3,000 per year was required, and also realized that to be more competitive in the market he had to drop the selling price by 20%. What is the new break-even volume? Round up to the next whole number
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