STT 231 EXAM 3A | QUESTIONS AND ANSWERS | 2026
UPDATED - MSU.
100% Correct 18
Incorrect 0
1 of
18
Term
How do you calculate df (for chi-squared)
Give this one a try later!
# of categories - 2 # of categories - n
total sample size - 1 # of categories - 1
Don't know?
, 2 of 18
Term
standard deviation for chi square...
Give this one a try later!
no bias √(2*k)
χ2 (k) statistic ± MOE
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3 of 18
Term
The distribution for the difference between 2 proportions is...
Give this one a try later!
T DISTRIBUTION WITH 26 DEGREES STANDARD NORMAL
OF FREEDOM DISTRIBUTION
STANDARD ERROR CHI-SQUARE DISTRIBUTION
Don't know?
UPDATED - MSU.
100% Correct 18
Incorrect 0
1 of
18
Term
How do you calculate df (for chi-squared)
Give this one a try later!
# of categories - 2 # of categories - n
total sample size - 1 # of categories - 1
Don't know?
, 2 of 18
Term
standard deviation for chi square...
Give this one a try later!
no bias √(2*k)
χ2 (k) statistic ± MOE
Don't know?
3 of 18
Term
The distribution for the difference between 2 proportions is...
Give this one a try later!
T DISTRIBUTION WITH 26 DEGREES STANDARD NORMAL
OF FREEDOM DISTRIBUTION
STANDARD ERROR CHI-SQUARE DISTRIBUTION
Don't know?
