QUESTION 2A study is being carried out to see any differences in life satisfaction between young, middle-aged, and older men and women. A life satisfaction questionnaire is given to each participantin the research. A high degree of life satisfaction is indicated by a high score on thequestionnaire. The results are listed in the table below.Adult CategoriesGenderYoungMiddleOlderMen710Women71110The MINITAB output for the above data is as follows.Analysis of VarianceSourcegenderadult categories 2DFMS6.0008.667C 0.2250.1876.000A4.3344.00027.333ErrorTotalAssume all the assumptions of ANOVA are met, answer the following questions.e) Do the data provide enough evidence to indicate a difference in the mean life satisfactionscore using different adult categories at a 5% significance level? Use p-value225

If P-value is less than level of significance then reject the null hypothesis. Otherwise fail to…

Answered: A study is being carried out to see any…

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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A survey has been conducted recently to study the hourly wages of part-time employees at the Food Delivery services sector. The result was organized into the following frequency distribution. Hourly Wages Number of Part-time Employees $40 − less than $50 12 $50 − less than $60 26 $60 − less than $70 35 $70 − less than $80 17 $80 − less than $90 8 $90 − less than $100 2 (i) Calculate the mean, mode and standard deviation of the hourly wages. (ii) Calculate the coefficient of variation. (iii) If the median is equal to 64, calculate Pearson’s 2nd coefficient of skewness and interpret your answer briefly. (iv) The government wants to carry out similar survey next year. If the error of a point estimate of the mean is not more than $1.5, use the 97% confidence level to determine the sample size required to achieve this error.
Which of the following are the names commonly used for the variable Y in sample regression? 1. covariate variable 2. independent variable 3. predictor variable 4. Explained variable 5. Response variable 6. explanatory variable 7. Predicted variable 8. Dependent variable 9. Criterion variable
Which is NOT an example of statistical bias? Response Bias Observer Effect Recall Bias Placebo Effect
A school principal claims that the number of students who are tardy to school does not vary from month to month. A survey over the school year produced the following results. Using a 0.10 level of significance, test a teacher’s claim that the number of tardy students does vary by month. Tardy Students Aug. Sept. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May Number 17 10 7 18 11 17 8 7 19 19 Copy Data Step 3 of 4 : Compute the value of the test statistic. Round any intermediate calculations to at least six decimal places, and round your final answer to three decimal places.
2. Introduction to variability A researcher is studying psychological factors in athletic achievement among teenage boys. One variable he is particularly interested in is competitiveness. What information does a measure of variability for the variable competitiveness convey? Check all that apply. What is the central tendency for the variable competitiveness among teenage boys? What is the average value for the variable competitiveness among teenage boys? Do all teenage boys have the same amount of competitiveness? How consistent are the values for competitiveness among teenage boys?
Used car auctions give car dealers an opportunity to increase their used car inventory by purchasing cars used as rental cars, assigned to company executives, and other similar activities. Suppose population 1 is all black cars sold at used car auctions, and population 2 is all white cars sold at used car auctions. Of interest is to estimate the difference in the mean sale price of all black cars sold at used car auctions and the mean sale price of all white cars sold at used car auctions. Based on this, using both the appropriate symbol and in words, state the one parameter of interest.
Does more education lower a person’s level of prejudice? The number of years of education and the score on a prejudice test for ten people is given in the following table. Higher scores on the test indicate more prejudice. Years of Education 12 15 14 13 18 10 16 12 10 4 Score on Prejudice Test 1 6 2 3 2 4 1 5 5 10 Conduct a hypothesis test to determine if there is a significant linear correlation between the two variables. What is the test statistic for this hypothesis test? -0.532 1.945 0.0127 -3.196
Interaction a. What is an interaction between two factors? b. In general, when using two-way analysis of variance, if we find that there is an interaction effect, how does that affect the procedure? c. Shown below is an interaction graph constructed from the data in Exercise 1. What does the graph suggest?

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