The p-value for a one-sided left-tail test is given by
A)Pr(Z - tact )= φ(tact).
B)Pr(Z

Question

The p-value for a one-sided left-tail test is given by
A)Pr(Z - tact )= φ(tact).
B)Pr(Z < tact )= φ(tact).
C)Pr(Z < tact )< 1.645.
D)cannot be calculated,since probabilities must always be positive.

Quizplus · Accepted Answer

For a one-sided left-tail test, we are interested in finding the probability of getting a test statistic smaller than our observed value. This can be shown as Pr(Z < tact), which is option B. Options A and C are not correct statements for a one-sided left-tail test, as they do not capture the correct probability values. Option D is also not correct, as probabilities can and should be calculated for statistical testing.

The P-Value for a One-Sided Left-Tail Test Is Given by