Answer:
Step-by-step explanation:
Required: Find the critical value for z or t.
Null Hypothesis: P = 0.9
Alternative Hypothesis: P ≠ 0.9
α = 0.01 implies a confidence level of 99%
The critical probability by formula, is CP = 1 - (α/2)
CP = 1 - 0.01/2 = 0.995
Using 10 degrees of freedom on the table of percentage points of the t-distribution, the critical t-statistic corresponds to 3.17
