Week 9 Revision Q's Flashcards
If the sample data has a mean of 30 can you conclude that the mean of the population is 30?
No
A sample mean is 30 and the 95% Confidence interval is
26 – 34. Which is the correct interpretation of this finding?
We are 95% confident that the population mean lies between 26-34
A researcher wants to test whether there is a difference in anxiety levels in one group of athletes before and
after a relaxation intervention. Which type of analysis should he / she used
Dependent t-test
A researcher wants to examine whether minutes of vigorous
exercise per week significantly predicts percentage body fat.
Which type of analysis should he/she use?
Regression
If researcher sets an alpha level of 0.05, and
then determines that p = 0.02, should the null
hypothesis be rejected?
Yes
You run a correlation analysis using an alpha of 0.05 and find r = 0.18, p = 0.32. Which pair of conclusions is appropriate for this finding?
The correlation is not
significant; fail to reject the null hypothesis
A t-test on the mean concentration ability of males and females is significant at the 5% level. Which of the following is the correct interpretation?
The gender difference observed in the sample is unlikely to be due to chance
The p-value for a correlation analysis is < 0.001. Which if the following is the correct
interpretation?
There is very strong evidence of
a relationship between the two
variables
What does the p-value mean?
The probability of finding that magnitude of effect if there was no effect in the population.
The likelihood of the difference being down to chance
If in truth there is no difference between two
groups in our research BUT our results tell us
there is, what error have been committed?
Type 1
In any single application of the hypothesis testing
procedure, is it possible for the researcher to make both a Type I error and a Type II error at the same time?
No
