What is the dependent variable

Assignment Help Basic Statistics

Reference no: EM13809362

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

Reference no: EM13809362

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