题目内容

The type Ⅰ error happens when: ()

A. H0 is true
B. H0 is rejected
C. H0 is false, but we accept H0
D. H0 is true, but we reject H0
E. P is samll

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There is a data set shown as follow: 17, 1, 12, 6, 9, 2, 8, 41. The arithmetic mean is:()

A. 8.5
B. 12
C. 8
D. 17
E. 9

Which measure should be used to compare the variability between height and weight. ()

A. CV
B. variance
C. range
D. standard deviation
E. inter-quartile range

Which measure should be used to describe the central tendency of the symmetrical distribution.()

A. median
B. arithmetic mean
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D. inter-quartile range
E. standard deviation

Which measure should be used to describe the dispersion of the skewed distribution. ()

A. range
B. arithmetic mean
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