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CHDA Chapter 5 Questions and Answers Graded A+
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Exam of 3 pages for the course CHDA at CHDA (CHDA Chapter 5)
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CHDA Chapter 5An analyst wishes to test the impact of the new patient schedule system on a number of
MRI tests performed per day. What statistical test should be used? - answer Paired t-
test
Which of the following measures of central tendency do 1/2 of the observations fall
above and 1/2 of the observations fall below? - answerMedian
A study was conducted to determine if students remembered more medical terms from
an online or in person course. The average number of terms recalled by the sample of
10 students in the in-person course was 75 with a standard deviation of 2.0. The
average number of terms recalled by sample of 10 students in the online courses was
50 with a standard deviation of 3.5. What statistical inference tool should be used to
determine if the difference between the two groups is statistically significant? -
answerTwo-sample t-test
A study was conducted to determine if students remembered more medical terms from
an online or in person course. The average number of terms recalled by the sample of
10 students in the in-person course was 75 with a standard deviation of 2.0. The
average number of terms recalled by sample of 10 students in the online courses was
50 with a standard deviation of 3.5. If the value of the test statistic was 2.5 and alpha
was set to 5%, what would be the conclusion of the test? - answerReject the null
hypothesis and conclude that the in-person students retained more terms
Which of the following measures of central tendency is most affected by extreme
values? - answerMean
The researcher would like to test the null hypothesis that a complication rates at two
hospitals are equal. What statistical test should the researcher use in this situation? -
answerThe Z-test for proportions
What is the purpose of Tukey's HSD test? - answerTest to determine which pairs of
means are different after a significant ANOVA
Given the data below, what is the 95% confidence interval of the mean? Mean equals
89.5, standard deviation equals 9.9, standard error of the mean equals .7 - answer88.1,
90.9
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