Gertrude and Ernest received their typing results. The results are normal and are shown below.
Types Of Errors per Page
Gertude - (Mean) 10
Standard Deviation- 1
Ernest - (Mean) 10 Standard Deviation- 4
Which statement is true?
A. Gertrude probably has more pages with exactly 10 errors than Ernest.
B. Ernest probably has at least 1 page with 0 errors, but Gertrude does not.
C. After 100 pages of typing, Ernest probably has made more errors than Gertrude.
D. It is equally likely that Gertrude and Ernest will make between 8 and 12 errors on a page.
1 answer
A. Since the variability (SD) is so small, this is likely. If SD = 0, all the pages would have 10 errors.
1 answer