题目内容

24. According to the text, which of the following is true of recordings?

A. [A]They are often inferior to live concerts in quality.
B. [B]They are easily accessible to the general public.
C. [C]They help improve the quality of music.
D. [D]They have only covered masterpieces.

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25. Regarding Gilbert’s role in revitalizing the Philharmonic, the author feels

A. [A]doubtful.
B. [B]enthusiastic.
C. [C]confident.
D. [D]puzzled.

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Data were collected on annual personal time (in hours) taken by a random sample of 16women and 7 men employed by a medium-sized company. The Human Resources Department believes that women tend to take morepersonal time than men because they tend to be the primary child care givers in thefamily.1. The correct null and alternative hypotheses (assuming women are group 1 and men are group 2) are

A. H 0: µ 1 - µ 2 =0 and H A: µ 1 - µ 2 < 0
B. H 0: µ 1 - µ 2 = 0 and H A: µ 1 - µ 2 ≠ 0
C. H 0: µ 1 - µ 2 = 0 and H A: µ 1 - µ 2 > 0.
D. H 0: µ 1 - µ 2 > 0 and H A: µ 1 - µ 2 < 0

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Which is correct in the above case?

A. women and men are dependent samples.
B. women and men are independent samples.
C. women and men are matched samples.
D. the observations are paired.

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The correct value of the test statistic is

A. 2.02
B. - 2.91
C. 0.458
D. 4.02

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24. According to the text, which of the following is true of recordings?

A. [A]They are often inferior to live concerts in quality. B. [B]They are easily accessible to the general public. C. [C]They help improve the quality of music. D. [D]They have only covered masterpieces.

25. Regarding Gilbert’s role in revitalizing the Philharmonic, the author feels

Which is correct in the above case?

The correct value of the test statistic is

A. [A]They are often inferior to live concerts in quality.
B. [B]They are easily accessible to the general public.
C. [C]They help improve the quality of music.
D. [D]They have only covered masterpieces.