Statistics Analysis


 

1. An ANOVA was conducted to compare the mean height increase of patients on 4 different growth hormone treatments. The test yielded a significant difference in means. When ranking the means, how many paired-comparisons of means are possible? B

4

6
8
16
2. Tukey’s method of multiple comparisons of means will lead to a probability of at least one Type I error that is higher than anticipated (selected). True or False. F

3. When analyzing categorical (qualitative) data, inferences are made about: B

α values
proportions
means
variances
4. A Chi-Squared Goodness of Fit (GOF) test is the proper test to apply to compare population proportions in a multinomial experiment involving categorical data. True or False T

5. A 95% confidence interval for the true proportion of all law school graduates who fail the bar exam is (0.03, 0.22). Give a practical interpretation of this interval. C

A. We can conclude, with legitimate statistical evidence, that approximately 95% of lawgraduates will score between 3% and 22% on the bar exam.

B. We can conclude, with legitimate statistical evidence, that the true proportion lawschool graduates will be either 3 or 22.

C. We are 95% confident that the true proportion of all law school graduates who fail the bar exam is between 0.03 and 0.22.

D. We are 95% confident that the true mean of all law school graduates who fail the bar exam is between 0.03 and 0.22.

 

 

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