[統計]補充題目
6. An industrial statistician wanted to determine if efforts to promote safety
have been successful. By checking the records of 250 employees, he found that
30 of them suffered either minor or major injuries that year. A random sample
of 400 employees last year revealed that 80 suffered some form of injury.
(a). Can the statistician infer at the 5% significance level that efforts to
promote safety have been successful?
(b). Estimate with 95% confidence the difference in population proportions.
7. A partial ANOVA table in a randomized block design is shown below, where
the treatments refer to different high blood pressure drugs, and the
blocks refer to different groups of men with high blood pressure
Source of Variation SS df MS F
Treatments * 4 * *
Blocks 3,120 6 * *
Error * * 115
Total 12,600 34
Fill in the missing values (identified by asterisks) in the above ANOVA Table.
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※ 編輯: dreamson 來自: 140.112.110.233 (03/27 14:49)