PSTAT EXAM 4 2025/2026 EXAM
QUESTIONS AND ANSWERS | 100%
PASS
student's t test for correlated groups really reduces to - 🧠 ANSWER
✔✔Student's t test for single samples using difference scores
As N gets infinitely large, the critical value of t equals the critical value of z.
- 🧠 ANSWER ✔✔true
In the t test for independent groups, the unbiased estimate of the
population variance is - 🧠 ANSWER ✔✔a weighted average of s1^2 and
s2^2
As df moves away from infinity, the t distribution - 🧠 ANSWER ✔✔flattens
Which of these values is NOT known when performing the single sample t-
test? - 🧠 ANSWER ✔✔Sample standard deviation
Population mean
Sample size
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
, The df for the single sample t is equal to - 🧠 ANSWER ✔✔n-1
The 99% confidence interval will be _______ the 95% confidence interval -
🧠 ANSWER ✔✔wider than
Which is NOT true of the sampling distribution of t? - 🧠 ANSWER ✔✔It is
identical to the z distribution
With other factors held constant, as the sample size decreases, the width
of the confidence
interval will - 🧠 ANSWER ✔✔increase
Properties of the t distribution? - 🧠 ANSWER ✔✔it is a family of many
curves that varies with degrees of freedom
it is symmetrical
it has a mean of 0
The independent group design involves analysis of the ______ scores and
the repeated
measures design involves analysis of the ______ scores - 🧠 ANSWER
✔✔raw; difference
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
QUESTIONS AND ANSWERS | 100%
PASS
student's t test for correlated groups really reduces to - 🧠 ANSWER
✔✔Student's t test for single samples using difference scores
As N gets infinitely large, the critical value of t equals the critical value of z.
- 🧠 ANSWER ✔✔true
In the t test for independent groups, the unbiased estimate of the
population variance is - 🧠 ANSWER ✔✔a weighted average of s1^2 and
s2^2
As df moves away from infinity, the t distribution - 🧠 ANSWER ✔✔flattens
Which of these values is NOT known when performing the single sample t-
test? - 🧠 ANSWER ✔✔Sample standard deviation
Population mean
Sample size
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
, The df for the single sample t is equal to - 🧠 ANSWER ✔✔n-1
The 99% confidence interval will be _______ the 95% confidence interval -
🧠 ANSWER ✔✔wider than
Which is NOT true of the sampling distribution of t? - 🧠 ANSWER ✔✔It is
identical to the z distribution
With other factors held constant, as the sample size decreases, the width
of the confidence
interval will - 🧠 ANSWER ✔✔increase
Properties of the t distribution? - 🧠 ANSWER ✔✔it is a family of many
curves that varies with degrees of freedom
it is symmetrical
it has a mean of 0
The independent group design involves analysis of the ______ scores and
the repeated
measures design involves analysis of the ______ scores - 🧠 ANSWER
✔✔raw; difference
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
