Question

Suppose they determined that one tailed p<.001. If their alpha was .05, what should they decide?...

Suppose they determined that one tailed p<.001. If their alpha was .05, what should
they decide?
A. ☐They should reject the null and report that there may be no difference between
boys and girls.
B. ☐They should reject the null and report that boys have more friendship contacts
than girls
C. ☐They should not reject the null and report that boys have more friendship
contacts than girls
D. ☐They should not reject the null and report that there may be no difference
between boys and girls.
E. ☐They should not reject the null and decide that there is a difference between
boys and girls.

Math   Statistics-And-Probability   
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Answer #1

Given that, they determined that one tailed p < 0.01. If their alpha was 0.05.

We reject the null hypothesis, since p-value is less than 0.05.

Therefore, correct answer is :

They should reject the null and report that boys have more friendship contacts than girls.

Note : Since, given test is one-tailed test, the null and alternative hypotheses are,

H0 : There may be no difference between boys and girls.

Ha : Boys have more friendship contacts than girls.

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