Question 26

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 27

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 28

Correlation coefficients, r, range from -1.00 to +1.00.

True

False

Question 29

It is not necessary to look at the frequency distribution if the mean, median, and mode are known.

True

False

Question 30

Positive relationships between two variables indicate that, as the score of one increases, the score of the other increases.

True

False