A small private college is interested in determining the percentage of its students who live off campus and drive to class. Specifically, it was desired to determine if less than 20 of their current students live off campus and drive to class.
The college decided to take a random sample of 108 of their current students to use in the analysis. Is the sample size of n = 108 large enough to use this inferential procedure?
A) Yes, since both np and nq are greater than or equal to 15
B) Yes, since the central limit theorem works whenever proportions are used
C) Yes, since n 30
D) No
Question 2
307 diamonds were sampled and randomly sorted into three groups of diamonds. These diamonds were randomly assigned to one of the three organizations, or groups (HRD, GIA, or IGI), that certify the appraisal of diamonds.
A study was conducted to determine if the average size of diamonds reported by these three certification groups differ. A completely randomized design was used and the resulting ANOVA table is shown below.
One-Way AOV for CARAT by CERT
Source DF SS MS F
CERT 2 8.3265 4.16326 ???
Error 305 15.2604 0.05003
Total 307 23.5869
Find the F-value that is missing in the ANOVA table.
A) 0.5242 B) 83.215 C) 0.0120 D) 0.5000
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