Question

Determine the upper-tail critical value to /2 in each of the following circumstances.

a. 1 - a=0.95, n = 10
d. 1-=0.95, n = 31
b. 1 - a=0.90, n = 10
e. 1 - a = 0.99, n = 48
c. 1 - a=0.95, n = 66

Answer 1

The upper-tail critical values for different scenarios are 1.645, 1.96, 1.282, 2.33, and 1.96.

Step-by-step explanation:

To determine the upper-tail critical value, we need to find the z-score that corresponds to the given confidence level. From the information given:

• a. 1 - a = 0.95, n = 10: The upper-tail critical value is 1.645.
• d. 1 - a = 0.95, n = 31: The upper-tail critical value is 1.96.
• b. 1 - a = 0.90, n = 10: The upper-tail critical value is 1.282.
• e. 1 - a = 0.99, n = 48: The upper-tail critical value is 2.33.
• c. 1 - a = 0.95, n = 66: The upper-tail critical value is 1.96.