MODULE 5: THE T-TEST (PORTAGE LEARNING STATISTICS CNSL 503, THE T-TEST) QUESTIONS AND ANSWERS 100% CORRECT

MODULE 5: THE T-TEST (PORTAGE
LEARNING STATISTICS CNSL 503, THE
T-TEST) QUESTIONS AND ANSWERS
100% CORRECT
When population standard deviation is known, the z-score is used, when population
standard deviation is unknown, the __ is used - ANSWER-t-score

True/False
Since t-scores are centered normally around the mean and form a bell-shaped curve,
probabilities can be calculated to draw inferences about populations. - ANSWER-True

___ determine how well the t-distribution approximates the normal distribution of the z-
scores. To calculate for any sample size, n-1 - ANSWER-Degrees of freedom (df)

A t distribution approximately resembles a normal distribution when n=___ - ANSWER-
n=12

T-testing for a one sample test is used when __ - ANSWER-the population mean is
known

In a one sample test, state the possible Ho and Ha hypotheses - ANSWER-Ho:
µ = known population mean

Ha:
µ > known population mean (right tailed)
µ < known population mean (left tailed)
µ ≠ equal known population mean (two tailed)


A 95% confidence intervals between -0.002 and 0.9205 is reported in research as: -
ANSWER-95% CI [-0.002, 0.9205]

Cohen's d calculates effect size to determine - ANSWER-the absolute magnitude or
size of the treatment.

The two types of sample studies include: - ANSWER-1. Independent
2. Paired

The two types of independent studies include: - ANSWER-1. independent measure
design