PSYC 3002 WEEK 6 TEST – QUESTION AND ANSWERS

PSYC 3002 WEEK 6 TEST – QUESTION AND ANSWERS • Question 1 2.5 out of 2.5 points If you are conducting a one-way chi-square for a study with 300 participants and 3 categories, what would the expected frequency be for a given category? Selected Answer: c. 100 Correct Answer: c. 100 • Question 2 2.5 out of 2.5 points An analysis of home addresses of the people enrolled in your program of study showed that 565 people live in large cities, 410 live in small towns, and 110 live in rural areas. What statistic should be used to analyze these data? Selected Answer: a. A one-way chi square Correct Answer: a. A one-way chi square • Question 3 2.5 out of 2.5 points A goodness of fit test has how many variables? Selected Answer: a. 1 Correct Answer: a. 1 • Question 4 2.5 out of 2.5 points A researcher used chi square to examine toy preferences of 5-year-old children. The researcher placed a tricycle, blocks, a train set, and puzzles in a room and observed how many of 20 children played with each type of toy. What is the degrees of freedom for this study? Selected Answer: c. 3 Correct Answer: c. 3 • Question 5 0 out of 2.5 points What is the degrees of freedom for a two-way chi-square that has one variable with two levels and one variable with three levels? Selected Answer: d. 6 Correct Answer: c. 2 • Question 6 2.5 out of 2.5 points Assume you have conducted a one-way H0 in which the H0 says the frequencies in the categories are equal. If the X2 was not significant, the appropriate conclusion is Selected Answer: c. there is insufficient evidence to conclude the frequencies in the sample categories are different. Correct Answer: c. there is insufficient evidence to conclude the frequencies in the sample categories are different. • Question 7 2.5 out of 2.5 points A researcher used chi square to examine toy preferences of 5-year-old children. The researcher placed a tricycle, blocks, a train set, and puzzles in a room and observed how many of 20 children played with each type of toy. What is the alternative hypothesis for this study: Selected Answer: b. Children will not play with the four types of toys equally. Correct Answer: b. Children will not play with the four types of toys equally. • Question 8 2.5 out of 2.5 points If you are conducting a one-way chi-square for a study with 200 participants and 4 categories, what would the expected frequency be for a given category? Selected Answer: b. 50 Correct Answer: b. 50 • Question 9 2.5 out of 2.5 points The statistic that describes the strength of the relationship in a two-way chi square that is a 2X2 design is called a(n) Selected Answer: a. phi coefficient Correct Answer: a. phi coefficient • Question 10 2.5 out of 2.5 points A researcher used chi square to examine toy preferences of 5-year-old children. The researcher placed a tricycle, blocks, a train set, and puzzles in a room and observed how many of 20 children played with each type of toy. What is the degrees of freedom for this study? Selected Answer: c. 3 Correct Answer: c. 3 • Question 11 2.5 out of 2.5 points Suppose you conduct an experiment with 24 participants who are asked to respond to one of three categories. Your obtained chi square is 9.92, which is statistically significant. What is the correct way to report this finding? Selected Answer: a. Χ2(2, N = 24) = 9.92; p 0.05 Correct Answer: a. Χ2(2, N = 24) = 9.92; p 0.05 • Question 12 2.5 out of 2.5 points Suppose you conduct an experiment with 44 participants who are asked to respond to one of three categories. Your obtained chi square is 5.22, which is statistically significant. What is the correct way to report this finding? Selected Answer: Χ2(2, N = 44) = 5.22; p 0.05 Correct Answer: Χ2(2, N = 44) = 5.22; p 0.05 • Question 13 2.5 out of 2.5 points The larger the obtained chi square value Selected Answer: a. the more likely we are to reject the null hypothesis. Correct Answer: a. the more likely we are to reject the null hypothesis. • Question 14 2.5 out of 2.5 points Nonparametric procedures are usually not our first choice among statistical procedures because Selected Answer: d. nonparametric procedures are less powerful than parametric procedures. Correct Answer: d. nonparametric procedures are less powerful than parametric procedures. • Question 15 2.5 out of 2.5 points In a one-way chi-square test, the null hypothesis states the observed frequencies do not equal the expected frequencies because Selected Answer: d. of sampling error. Correct Answer: d. of sampling error. • Question 16 2.5 out of 2.5 points Nonparametric procedures are used instead of parametric procedures when Selected Answer: b. our data do not meet the assumptions of parametric procedures. Correct Answer: b. our data do not meet the assumptions of parametric procedures. • Question 17 2.5 out of 2.5 points Chi square can be used to analyze variables measures on either a nominal or ordinal scale. Selected Answer: False Correct Answer: False • Question 18 2.5 out of 2.5 points Chi square is used to analyze variables measure on what scale of measurement? Selected Answer: a. Nominal Correct Answer: a. Nominal • Question 19 2.5 out of 2.5 points The two-way Χ2 is a test of Selected Answer: c. whether two variables are independent. Correct Answer: c. whether two variables are independent. • Question 20 2.5 out of 2.5 points A test of independence has how many variables? Selected Answer: b. 2 Correct Answer: b. 2