Question

Find the critical value

zc

necessary to form a confidence interval at the level of confidence shown below.

c=0.87

zc=

​(Round to two decimal places as​ needed.)

Answer 1

The critical value, zc, necessary to form a confidence interval at a level of confidence 0.87 is approximately 1.13.

Step-by-step explanation:

To find the critical value, zc, necessary to form a confidence interval at a level of confidence 0.87, we need to determine the corresponding z-score.

The z-score that corresponds to a given level of confidence can be found using a standard normal distribution table or a calculator.

For a level of confidence of 0.87, the z-score is approximately 1.13 (rounded to two decimal places).