Consider the following. (Give your answers correct to two decimal places.)

(a) Determine the value of the confidence coefficient z(á/2) for 1 - á = 0.87.
Incorrect: Your answer is incorrect. . 0.44

To determine the value of the confidence coefficient z(α/2) for 1 - α = 0.87, we need to find the z-score corresponding to that confidence level.

Step 1: Find the α/2 value
Since α is the level of significance and it represents the probability of making a Type I error, 1 - α represents the confidence level. In this case, 1 - α = 0.87.

To find α/2, divide 0.87 by 2:
α/2 = 0.87/2 = 0.435

Step 2: Find the corresponding z-score
The z-score represents the number of standard deviations away from the mean for a specific confidence level. To find the z-score corresponding to α/2 = 0.435, you can refer to a standard normal distribution table or use a calculator or software that provides z-score calculations.

Using a calculator or software, inputting the value 0.435 into the standard normal distribution calculator, we can find the corresponding z-score. The z-score for α/2 = 0.435 is approximately 1.84.

So, the value of the confidence coefficient z(α/2) for 1 - α = 0.87 is approximately 1.84.