Portage Learning Statistics CNSL 503, The t-Test
Module 5 The t-Test 2025-2026 Most Recent
Version Comprehensive Questions and Verified
Answers Accurate Solutions Already Graded A+
Get it 100% Correct
___ determine how well the t-distribution approximates the normal distribution of the z-
scores. To calculate for any sample size, n-1 - CORRECT ANSWER: Degrees of
freedom (df)
A __ design combines independent measures and repeated measures concepts, where
participants in two study groups are matched based upon specific variables/criteria that
may be relevant to the study. After treatment is applied to both groups, the results are
compared. - CORRECT ANSWER: matched pairs study
A __ design is when a researcher is looking to see if there is any difference between the
scores within the same group of participants. - CORRECT ANSWER: within subjects
design
A __ design t-test is a dependent, two-sample study that uses the same participants
under each treatment, for example mean exam scores before and after spring break. -
CORRECT ANSWER: repeat measure design
A __ design t-test uses participants randomly assigned to a treatment group each with
its own condition and the researcher looks for whether or not there is a significant
difference in the mean between the two treatments. - CORRECT ANSWER: between-
subjects design
A __ sample t-test uses 2 samples from different groups, like independent measure
design or between-subjects design. - CORRECT ANSWER: independent
, A __ sample t-test uses 2 samples from the same group, like repeat measure design,
within subjects design, or matched pairs study. - CORRECT ANSWER: paired sample t-
test
A ___ design t-test uses different samples from different populations, for example men
and women - CORRECT ANSWER: independent measure design
A 95% confidence interval tells a researcher __ - CORRECT ANSWER: A 95%
confidence interval tells a researcher that they can be 95% confidence that the true
population mean falls between the lower end -> higher end.
A 95% confidence intervals between -0.002 and 0.9205 is reported in research as: -
CORRECT ANSWER: 95% CI [-0.002, 0.9205]
A larger sample size ___ standard error which reduces margin of error - CORRECT
ANSWER: reduces
A t distribution approximately resembles a normal distribution when n=___ - CORRECT
ANSWER: n=12
Cohen's d calculates effect size to determine - CORRECT ANSWER: the absolute
magnitude or size of the treatment.
For independent sample t-tests, ___ is calculated, then __ is calculated to estimate
standard error - CORRECT ANSWER: variance and pooled variance
For independent samples t-tests, the possible hypotheses are: - CORRECT ANSWER:
Ho: µ1=µ2 (population means are equal)
Ha: µ1≠µ2 (population means are not equal)
Module 5 The t-Test 2025-2026 Most Recent
Version Comprehensive Questions and Verified
Answers Accurate Solutions Already Graded A+
Get it 100% Correct
___ determine how well the t-distribution approximates the normal distribution of the z-
scores. To calculate for any sample size, n-1 - CORRECT ANSWER: Degrees of
freedom (df)
A __ design combines independent measures and repeated measures concepts, where
participants in two study groups are matched based upon specific variables/criteria that
may be relevant to the study. After treatment is applied to both groups, the results are
compared. - CORRECT ANSWER: matched pairs study
A __ design is when a researcher is looking to see if there is any difference between the
scores within the same group of participants. - CORRECT ANSWER: within subjects
design
A __ design t-test is a dependent, two-sample study that uses the same participants
under each treatment, for example mean exam scores before and after spring break. -
CORRECT ANSWER: repeat measure design
A __ design t-test uses participants randomly assigned to a treatment group each with
its own condition and the researcher looks for whether or not there is a significant
difference in the mean between the two treatments. - CORRECT ANSWER: between-
subjects design
A __ sample t-test uses 2 samples from different groups, like independent measure
design or between-subjects design. - CORRECT ANSWER: independent
, A __ sample t-test uses 2 samples from the same group, like repeat measure design,
within subjects design, or matched pairs study. - CORRECT ANSWER: paired sample t-
test
A ___ design t-test uses different samples from different populations, for example men
and women - CORRECT ANSWER: independent measure design
A 95% confidence interval tells a researcher __ - CORRECT ANSWER: A 95%
confidence interval tells a researcher that they can be 95% confidence that the true
population mean falls between the lower end -> higher end.
A 95% confidence intervals between -0.002 and 0.9205 is reported in research as: -
CORRECT ANSWER: 95% CI [-0.002, 0.9205]
A larger sample size ___ standard error which reduces margin of error - CORRECT
ANSWER: reduces
A t distribution approximately resembles a normal distribution when n=___ - CORRECT
ANSWER: n=12
Cohen's d calculates effect size to determine - CORRECT ANSWER: the absolute
magnitude or size of the treatment.
For independent sample t-tests, ___ is calculated, then __ is calculated to estimate
standard error - CORRECT ANSWER: variance and pooled variance
For independent samples t-tests, the possible hypotheses are: - CORRECT ANSWER:
Ho: µ1=µ2 (population means are equal)
Ha: µ1≠µ2 (population means are not equal)
