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Researchers measured the amount of plasma carotenoids (in micrograms per milliliter) of male and female zebra...

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Statistics

Researchers measured the amount of plasma carotenoids (inmicrograms per milliliter) of male and female zebra finches. Hereare some summary statistics from the study (note: standarderror=standard deviation/sqrt(n)):

Sex

n

Mean

Standard Error

Males

50

31.77

1.85

Females

52

29.74

2.02

Do male and female zebra finchesdiffer in their plasma carotenoid levels? To answer this question,the researchers tested the following hypotheses:

H0:mM = mF versusHa: mM ≠mF

What can we conclude at significance level 5%?

  1. Reject the alternative hypothesis
  2. Fail to reject the alternative hypothesis
  3. Reject the null hypothesis
  4. Fail to reject the null hypothesis

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