Question 1. Regression uses the least squares method to fit a model.
True
False
Question 2. The difference between the highest and lowest score in a distribution is called:
Semi-quartile range
Range
Mean
Median
Question 3. This is the measurement of dispersion equal to the square root of the mathematical variance.
Mean
Median
Standard deviation
Range
Question 4. This is used to compare means while controlling for the effect of a covariate.
ANOVA
RANOVA
ANCOVA
Dependent t-test
Question 5. The assumptions for ANCOVA differ substantially from those for ANOVA.
True
False
Question 6. When the researcher incorrectly rejects the null hypothesis, it is known as:
Hypothesis error
Statistical significance
Type I error
Type II error
Question 7. You are studying the effect of hypnosis on weight loss. You will measure each patient's weight pre- and post-intervention. The most appropriate test is:
One sample t-test
MANOVA
ANCOVA
Dependent groups t-test
Question 8. What is the minimum level of measurement appropriate for the independent variable in a t-test?
Nominal
Ordinal
Interval
Ratio
Question 9. ANOVA assumes which of the following?
Random sampling
Normal distribution
Dependent variable is at least interval
Three or more groups of independent variable
All of the above
Question 10. Public Health nurses want to compare the mean weight of US 6th graders to a sample of 6th graders in one school. Which statistical test is most appropriate
One-sample t-test
ANOVA
ANCOVA
Independent t-test
Question 11. A group of neonatal nurses wanted to know if there was a difference in mean heart rate between premature babies who were swaddled and babies who were not swaddled. Babies were randomly assigned to swaddling or no swaddling. Which test is most appropriate?
One sample t-test
ANCOVA
Independent t-test
Logistic regression
Question 12. Psych nurses wanted to evaluate the effect of three different treatments for anxiety - positive imagery, therapeutic touch, and medication on anxiety score (interval data) while controlling for the effect of length of stay. Which test is most appropriate?
ANOVA
ANCOVA
Independent t-test
Paired t-test
Question 13. Critical care nurses wanted to evaluate the effect of heparin vs saline IV flush solution on IV patency (patent vs not patent). Which test is most appropriate?
One sample t-test
Independent t-test
Chi-square test
ANOVA
Question 14. A nurse researcher wanted to evaluate blood pressure in a set of patients/research subjects at 1, 3, and 6 months. What test would be most appropriate?
Independent t-test
ANVOVA
RM-ANOVA
ANCOVA
Question 15. In a study that examines the effect of a peer mentor on the heart rate of patients, what is the dependent variable?
Peer mentoring
Emotional status
Heart rate
Patients
Question 16. A variable with equal distances between score units which also has a true meaningful zero is:
Ordinal
Cardinal
Ratio
Nominal
Question 17. The standard deviation is:
The difference between the 3rd and 1st quartile.
The squared deviations from the mean.
The difference between the highest and lowest scores.
The square root of the variance.
Question 18. If a researcher accepts a null hypothesis when that hypothesis is actually true, she has committed:
a type I error
a type II error
no error
a causation
Question 19. Chi-square tests can be conducted for a 4X3 contingency table.
True
False
Question 20. This is used when a conservative approach is desired and an expected cell frequency is less than 5 in a 2X2 table.
Fisher's exact test
Cramer's V
Yates' correction
Regression
Question 21. The distribution of chi-square values is NOT normally distributed.
True
False
Question 22. Generally, an ANOVA test is used when 3 or more variables are compared.
True
False