BUAL 2650 YAN EXAM 2 QUESTIONS WITH ANSWERS!!

BUAL 2650 YAN EXAM 2 QUESTIONS
WITH ANSWERS!!

what are matched pairs? - ANSWERaka matched samples, they are paired up so
that the participants share every characteristic except for the one under investigation

If p < 0.10 - ANSWERthere is SOME evidence to reject H0

If p < 0.05 - ANSWERthere is STRONG evidence to reject H0

If p < 0.01 - ANSWERthere is VERY STRONG evidence to reject H0

if p < 0.001 - ANSWERthere 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 _________ - ANSWERT-test

Uy = B0 + B1*X+ E - ANSWERthe mean value of the dependent variable y when the
value of the independent variable is x

r^2 - ANSWER- simple coefficient of determination
- proportion of the total variation explained by the overall regression model
- r^2 = [0, 1]
- r^2= explained variation/ total variation

SSR - ANSWERexplained variation

SSE - ANSWERunexplained variation
- sum of squares due to error


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 ______ - ANSWERt

when testing the difference between 2 population proportions using large
independent random samples, the _______ test statistic is used - ANSWERz

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 _______ -
ANSWER9

D0 - ANSWERa number whose value varies depending on the situation. Often D0
will be the number 0