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

MODULE 5: THE T-TEST (PORTAGE LEARNING STATISTICS CNSL 503, THE T-TEST) QUESTIONS AND 100% CORRECT ANSWERS When population standard deviation is known, the z-score is used, when population standard deviation is unknown, the __ is used - Correct 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. - Correct Answer True ___ 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 t distribution approximately resembles a normal distribution when n=___ - Correct Answer n=12 T-testing for a one sample test is used when __ - Correct Answer the population mean is known