BUAL 2650 YAN EXAM 2 QUESTIONS & ANSWERS
What are matched pairs? - answer -aka matched samples, they are paired up so that
the participants share every characteristic except for the one under investigation
If p < 0.10 - answer -there is some evidence to reject h0
If p < 0.05 - answer -there is strong evidence to reject h0
If p < 0.01 - answer -there is very strong evidence to reject h0
If p < 0.001 - answer -there is extremely strong evidence to reject h0
In testing the difference between the means of two normally distributed populations
using independent random samples with equal variances, the correct test statistic to use
is the _________ - answer -t-test
When testing a hypothesis about the mean of a population of paired differences in
which two different observations are taken on the same units, the correct test statistic to
use is ______ - answer -t
When testing the difference between 2 population proportions using large independent
random samples, the _______ test statistic is used - answer -z
If we are testing the hypothesis about the mean of a population of paired differences
with samples of n1=10, n2=10, the degrees of freedom for the t-statistic is _______ -
answer -9
D0 - answer -a number whose value varies depending on the situation. Often d0 will be
the number 0
Assumptions for t-test statistic - answer -- independent samples
- equal variances
- either normal populations or large sample sizes
Paired differences experiment - answer -an experiment in which we have obtained 2
different measurements on the same "n" units is called ________
Ud (mu d) - answer -the mean of population of paired differences
Dependent (response) variable - answer -variable we wish to understand/ predict
Independent (predictor) variable - answer -the variable we will use to understand or
predict the dependent variable
What are matched pairs? - answer -aka matched samples, they are paired up so that
the participants share every characteristic except for the one under investigation
If p < 0.10 - answer -there is some evidence to reject h0
If p < 0.05 - answer -there is strong evidence to reject h0
If p < 0.01 - answer -there is very strong evidence to reject h0
If p < 0.001 - answer -there is extremely strong evidence to reject h0
In testing the difference between the means of two normally distributed populations
using independent random samples with equal variances, the correct test statistic to use
is the _________ - answer -t-test
When testing a hypothesis about the mean of a population of paired differences in
which two different observations are taken on the same units, the correct test statistic to
use is ______ - answer -t
When testing the difference between 2 population proportions using large independent
random samples, the _______ test statistic is used - answer -z
If we are testing the hypothesis about the mean of a population of paired differences
with samples of n1=10, n2=10, the degrees of freedom for the t-statistic is _______ -
answer -9
D0 - answer -a number whose value varies depending on the situation. Often d0 will be
the number 0
Assumptions for t-test statistic - answer -- independent samples
- equal variances
- either normal populations or large sample sizes
Paired differences experiment - answer -an experiment in which we have obtained 2
different measurements on the same "n" units is called ________
Ud (mu d) - answer -the mean of population of paired differences
Dependent (response) variable - answer -variable we wish to understand/ predict
Independent (predictor) variable - answer -the variable we will use to understand or
predict the dependent variable
