题目:
In order to test whether the mean IQ of employees in an organization is greater than 100, a sample of 30 employees is taken and the sample value of the computed test statistic, tn-1=3.4. The null and alternative hypotheses are:()
A. H0:μ=100; Ha:μ≠100.
B. H0:μ≤100; Ha:μ>100.
C. H0:μ=100; Ha:X≠100.
答案:
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