T&D Ch 8 Quiz

the t-test is used to assess whether groups differ on which of the following types of variable? a. nominal and ordinal b. interval and ratio c. linear and curvilinear c. bivariate and univariate d. categorical with two levels and continuous

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ANOVA is a _ statistic a. multivariate b. univariate c. bivariate d. univariate

a. multivariate

conceptually, ANOVA is the comparison of variance within groups with the variance among groups a. true b. false

a. true

inferential statistics are based on the assumption that the sampled population has normally distributed characteristics a. true b. false

a. true

type 1 error is deciding that you have a significant finding when you do not a. true b. false

a. true

for a t test comparing two groups that consist of the same individuals, we use the t test for _ samples a. independent b. dependent c. asymmetric d. symmetric

b. dependent

correlation coefficients show us the a. relationship between the mean scores for two variables b. strength of relationship between two variables c. variance of scores in two different groups d. distribution of individuals in two different groups e. distribution of variables in two different groups

b. strength of relationship between two variables

the properties of a normal curve are such that _ of the values under it occur plus or minus one standard deviation from the mean a. 33% b. 50% c. 68% d. 95% e. 99%

c. 68%

when data are skewed, which of the following statistics are not necessary to adequately describe the data a. mean b. median c. mode d. chi-square

d. chi-square

inferential statistics are based on the assumption(s) except _ a. a normal distribution of values in a population b. random sampling of the population c. every individual in a sample having an equal chance of being sampled d. snowball sampling

d. snowball sampling