Week 6 Part 2

Question 1

Confidence intervals

Answer 1

Range of values that includes the real (or true) mean for a population of people

Question 2

What happens when the CI crosses zero?

Answer 2

Then the result is not statistically significant

Question 3

Large p value

Answer 3

If there is a high probability that the results are due to chance

Question 4

Alpha p value is typically

Answer 4

5%

Question 5

Chi square

Answer 5

Statistic used to analyze nominal (categorical) data

Question 6

T test

Answer 6

Is used to compare the mean of two groups

Example: do elderly mean and women differ in speed of walking?

Question 7

Analysis of variance ANOVA

Answer 7

used to compare results for more than two groups?

Example: are there differences in walking speeds among elderly men, middle aged men, and middle aged women?

Question 8

Repeated measures ANOVA

Answer 8

Repeated measure is used to compare multiple measures from the same subject. Multiple measure may be taken within a shorter or longer period.

Question 9

Analysis of covariance (ANCOVA)

Answer 9

Comparison was made between two treatments at three time points