Healthcare Stats Test 2

The independent samples t test is used to determine differences in the means of

2 groups only

The independent samples t test is best described as

A parametric test

the chi-square test is best described as

a nonparametric test

the kruskal-wallis test is

a nonparametric test

the mann-whitney u test is best described as

a nonparametric test

The paired t test is

a parametric test

the mcnemar test is used to determine if the proportions are different among

a pretest measure and a posttest measure, or a measure on a case group and a matched control group

which test should be used to answer the question: are men or women more likely to use seatbelts?

chi-square test

the mcnemar test is used to

compare pretest-posttest proportions on the same person, compare proportions on a case and matched control, and assess interrater agreement

If the ANOVA test is significant, what do we do next?

conduct a nonparametric test

the chi-square test is used to determine if the proportions are different among

four or more groups defined by two variables

do children who are immunized against chickenpox miss fewer days of school than children who are not immunized? which is the grouping variable?

immunization status

students' independent samples t test is best used when the measurement scale of the characteristic of interest is

interval or ratio

the one-way ANOVA is best used when the measurement scale of the characteristic of interest is

interval or ratio

the paired t test is est used when the measurement scale of the characteristic of interest is

interval or ratio

when analyzing the mean or median differences of paired data, which of the following are considered more important?

magnitude of the difference, and statistical significance of the difference

which test should be used to answer the question: are teenagers more likely to use a seat belt after viewing a graphic highway safety video?

mcnemar test

which of the following measures of central tendency are tested by the wilcoxon matched-pairs test to determine whether two groups are significantly different?

medians

a cross-tabulation is an appropriate way to display data that are

nominal

The Mann-Whitney U test is best used when the measurement scale of the characteristic of interest is

nominal and interval or ratio

the wilcoxon matched pairs test is best used when the measurement scale of the characteristic of interest is

nominal, interval, or ratio

the one-way ANOVA determines whether the means of the groups are different by comparing the

ranks of the raw data

do people who exercise three+ times a week have lower systolic blood pressure than people who exercise less than three times a week? which variable should be normally distributed?

systolic blood pressure

nonparametric tests such as the kw and the mw u-test should be used when

the data do not meet the distribution requirements for a parametric test

the kw test would be better than a one-way ANOVA when

the dependent variable is not normally distributed

the fisher's exact test is used when

the expected frequency in a cell is less than five

the yates' continuity correction is used when

the expected frequency in at least one cell is less than 10

if the variances of the two groups being compared are significantlly different which independent samples t test should be used?

the independent samples t test for separate variances

the kw h-test can be used when

the measurement scale is ordinal

the wilcoxon matched pairs test is most likely to be significant when

the sums of the ranks of the negative differences is substantially greater than that of the positive differences and vice versa

in a cross-tab table, what does A+B+C+D represent?

the total sample

student's independent samples t test is best used when

the total sample size is at least 30 and the grouping variable is dichotomous

the MW U-test is best used when

the total sample size is at least 8 and the grouping variable is dichotomous

the kw test is used to determine whether the distributions of which of the following are different from each other?

three or more independent measures

the mann-whitney u-test is used to determine the differences in the distribution of a variable in

two groups only

data are considered paired if

two measures of the same variable are taken on the same person, or measures of the same variable are taken on a case and a matched control

the paired t test is used to determine whether the means of which of the following are different from one another?

two repeated measures and measures from a case and a matched control

the situation in which an independent samples t test would be used instead of an ANOVA is

when there are only two categories in the grouping variable

the one-way ANOVA test tells you

which group has the biggest variance

which of the following statistical tests can be used if the data are paired but normally distributed in only one of the measures being compared?

wilcoxon matched pairs test

do women make more visits to their primary care physician in a year than men? which variable is the grouping variable?

Gender

if data are normally distributed in only one group, then which test can be used?

Mann-Whitney U-Test