Question

f we want to provide a 95% confidence interval for the mean of a population, the confidence coefficient will be a. .485. b. 1.96. c. .95. d. 1.645.

Answer 1

Answer: The confidence coefficient will be 1.96 (b.)

Explanation:

• The confidence coefficient is calculated just like the z critical value.

• Therefore, first calculate the z score

95% = 0.95 / 2

= 0.475

• Then check from the normal curve of the z table...in the inside look for 0.475

• And you will find it has been plotted against 1.96