You intend to conduct a test of independence for a contingency table with 5 categories in the columnvariable and 6 categories in the row variable. You collect data from 933 subjects.What are the degrees of freedom for the x² distribution for this test?d.f. =

From the provided information,Categories in column variable (c) = 5Categories in row variable (r) =…

Answered: You intend to conduct a test of…

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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Read the statements and decide whether it is true or false. The number of degrees of freedom for a test of independence is equal to the sample size minus one. The test to use when determining if the college or university a student chooses to attend is related to his or her socioeconomic status is a test for independence.
Charlie isinterested in whether elementary school students, middle school students, or high school students spend more time reading in the summer. In the beginning of the school year he asks 20 elementary school students, 15 middle school students and 40 high school students to report the number of pages they read over the summer. What statistical test should Charlie use to test his research question?
Suppose you were to collect data for the following pair of variables, people: age, grip strength. You want to make a scatterplot. Which variable would you use as the explanatory variable? age grip strength Which variable would you use as the response variable? age grip strength Would you expect to see a positive or negative association? positive negative neither
In Exercises 33 to 36, determine whether or not the conditions for using two-sample t procedures are met. 33. Shoes How many pairs of shoes do teenagers have? To find out, a group of AP® Statistics students conducted a survey. They selected a random sample of 20 female students and a separate random sample Females 333 95 4332 66 410 8 9 100 7 0 0 4455 WW~~ 1 1 2 2 2 Males 4 3 555677778 0000124 3 58 Key: 22 represents a male student with 22 pairs of shoes.
Suppose you are interested in testing whether the mean earning of men in California differs significantly from the mean earning of men in New York. If the number of men from California in the sample is 123 and the number of men from New York in the sample is 88, how many degrees of freedom are there?
c. this test statistic for data = d. the p-value for this sample =
Complete the missing information for this regression model. Note: N = 26. ]X3 Ý = 34.482 + 3.921X1 2.812X2 2.162 2.027 2.163 0.872 Standard Errors 15.949 1.934 t-ratios 0.0951 P-values (Except for P-values, report all values occurote to 3 decimal places. For P-values, report accurate to 4 decimal places.)
The table below shows the grades of the 20 students of a martial arts class. There are three grades: satisfactory(S), unsatisfactory(U), and incomplete(I) Question: Which measure of central tendency is appropriate for the variable? Mode Median Mean
Health insurer benefits vary by the size of the company. The sample data below show the number of companies providing health insurance for small, medium, and large companies. For the purpose of this study, small companies are companies that have fewer than 100 employees. Medium-sized companies have 100 to 999 employees, and largevcompanies have 1000 or more employees. The questionnaire sent to 225 employees asked whether or not the employee had health insurance and then asked the employee to indicate the size of the company. Health Insurance Size of company Yes No Total Small. 35 15 50 Medium 67 8 75 Large 87 13 100 A. Conduct a test of independence to determine whether health insurance coverage is independent of the size of the company. What is the p-value? Compute the value of the x2 test statistic (to 2 decimal)
I can't understand why the data is the percentage of surveyed parents.
You collect data on number of hours spent studying, on average, throughout the Fall 2019 semester for all Stonehill students. You have a colleague at the College of the Holy Cross in Worcester, MA who collects the same data at Holy Cross. You want to compare the average number of hours spent studying during the Fall 2019 semester for male students at Stonehill, female students at Stonehill, male students at Holy Cross and female students at Holy Cross. Which statistical test would you use to compare the students at Stonehill and Holy Cross to look for significant differences in study time? a. one sample t test b. two sample t test c. repeated measures t test d. ANOVA
Jocelyn believes that the amount of sleep she tends to get on weekends differs from the amount of sleep she tends to get during the school week. To investigate this claim, she randomly selects 10 weekend days and 10 school days. She consults her smart watch to determine the number of hours she slept for each of the selected days. Here are the data. School week: 7, 7.5, 8, 6.5, 8, 7.5, 7, 6.5, 7, 8Weekend: 9.5, 9.5, 8.25, 8.5, 7.5, 10.25, 8, 7, 9.5, 10 Jocelyn would like to determine if these data provide convincing evidence that the true mean amount of sleep she gets on the weekend differs from the true mean amount of sleep she gets during the school week. She tests H0: μS – μW = 0, Ha: μS – μW ≠ 0, where μW = the true mean amount of sleep Jocelyn gets on the weekend and μS = the true mean amount of sleep she gets during the school week. The conditions for inference are met. What are the values of the test statistic and P-value for a t-test about a difference in means? Find the…

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You intend to conduct a test of independence for a contingency table with 5 categories in the column variable and 6 categories in the row variable. You collect data from 933 subjects. What are the degrees of freedom for the x² distribution for this test? d.f. =