4. Suppose the National Transportation Safety Board (NTSB) wants to examine thesafety of compact cars, midsize cars, and full-size cars. It collects a sample of threefor each of the treatments (cars types). Using the hypothetical data provided below,test whether the mean pressure applied to the driver's head during a crash test isequal for each types of car. Use a = .05. Use a post hoc test to determine which pairsof mean are significantly different. Explain in what way are they different.Car:Compact MidsizeFull-size16434694846554274563.702525402666.67473.67447.3331.1849.1741.68SS1944.394835.38 3474.45SourceSSdfMSFBetween86049.55643024.77825.1749Within10254.226.1709.0367Total96303.7768.2.

There are 3 types of cars viz compact, mid-size and full size. Data table with Measurements and…

Answered: Suppose the National Transportation…

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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3. The amount of time (in minutes) it took each individual in a sample of athletes to run a mile was recorded. In this particular sample, most of the athletes were able to run the mile quickly, but there were a small number of athletes who were not fast runners and needed more time to complete the mile. Two measures of center were computed for this sample: 12.9 minutes and 9.5 minutes. One of these measures is the mean and one is the median. Which measure must be the mean? A. The mean is 9.5 minutes because the distribution of running times would be skewed to the left. B. The mean is 9.5 minutes because the distribution of running times would be skewed to the right. c. The mean is 12.9 minutes because the distribution of running times would be skewed to the left. D. The mean is 12.9 minutes because the distribution running times would be skewed to the right.
Question 2. Crescent Oil has developed three new blends of gasoline and must decide which blend or blends to produce and distribute. A study of the miles per gallon ratings of the three blends is being conducted to determine if the mean ratings are the same for the three blends. Five automobiles have been tested using each of the three gasoline blends and the miles per gallon ratings; Automobile (Block) 12345 2 4 5 Type of Gasoline (Treatment) Blend X Blend Y Blend Z 31 30 29 33 26 30 29 29 31 25 29.8 30 29 28 Treatment Means a. Compute the analysis of variance for the randomized block design 28.8 29 26 28.4 Block Means 30.333 29.333 28.667 31.000 25.667
The null hypothesis: H , :0 The alternative hypothesis: H :0 Н 1 The type of test statistic: (Choose one) v The value of the test statistic: (Round to at least three decimal places.) The p-value: (Round to at least three decimal places.) Can we reject the claim that the mean annual income of teachers from Utah is greater than or equal to the mean annual income of teachers from Oregon? Yes No
If a data set is small , like one that has only six values . Why bother to contrast a histogra
Which statistic would you use if you are interested in comparing the mean number of hours worked by sex.
A manager wishes to determine whether the mean times number of sick days differ for three levels of employees. He randomly selected 10 employees within each level (Hourly, Salaried, and Management). Decide what statistical procedure would most likely be used to answer the research question. Assume all assumptions have been met for using the procedure.
According to a dietary study. high sodium in take may be related to ucers. stomach cancer. and migraine headaches. The human requirement for salt is only 220 milligrams per day. which is surpassed in most single servings of ready-to-eat cereals. If a random sample of 20 similar servings of a certain cereal has a mean sodium content of 244 milligrams and a standard devlation of 24.5 miligrams, does this suggest at 0.05 level of significance that the average sodlum content for a single serving of such cereal is greater than 220 milligrams? The p-value of the test statistic in 6 decimal places and the critical value in two decimal places is: example answer: 0.123456 and 1.23
The governor of Florida would like to estimate the mean age of all Florida residents. To do so, he randomly selects 500 Florida residents and determines their mean age to be 58.2 years. However, according the most recent census data, the mean age of all Florida residents is 55.6 years. Which of the following properly describes the 500 Florida residents who were randomly selected? sample statistic population parameter
A psychology student conducted a study on using a chief executive officer's facial structure to predict a firm's financial performance. The facial width-to-height ratio (WHR) for each in a sample of 47 CEOs at publicly traded firms was determined. The sample resulted in x=2.23 and s=0.35. The student wants to predict the financial performance of a firm based on the value of the true mean facial WHR of CEOs. The student wants to use the value of μ=2.1. Do you recommend he use this value? Conduct a test of hypothesis for μ to help you answer the question. Specify all the elements of the test, including H0, Ha, test statistic, p-value, and your conclusion. Test at α=0.01.
A psychological study wants to analyze the relationship between anxiety and binge drinking; a questionnaire for anxiety and questionnaire for binge drinking is administered to each subject. What would be a good statistical test to test the hypothesis?
If you wanted to determine whether mean levels of blood glucose were different according to gender and age a one-way ANOVA would be an appropriate test to perform. True False
A consumer advocacy group is doing a large study on car rental practices. Among other things, the consumer group would like to do a statistical test regarding the mean mnonthly mileage, u, of cars rented in the U.S. this year. The consumer group has good reason to believe that the mean monthly mileage of cars rented in the U.S. this year is greater than last year's mean, which was 2750 miles. The group plans to do a statistical test regarding the value of u. It chooses a random sample of monthly mileages and computes the mean of the sample to be 2900 miles and the standard deviation to be 700 miles. Based on this information, complete the parts below. (a) What are the null hypothesis H, and the alternative hypothesis H, that should be used for the test? H.: O

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