# Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value t/2, (b) find the critical value z,/2, or (c) state that neither the normal distribution nor the t distribution applies.230, x 32.6 hg, s = 7.9 hg. The confidence level is 90%Here are summary statistics for randomly selected weights of newborn girls: nSelect the correct choice below and, if necessary, fill in the answer box to complete your choice.A.(Round to two decimal places as needed.)В.Za/2(Round to two decimal places as needed.)C. Neither the normal distribution nor the t distribution applies.

Question
52 views
check_circle

Step 1

The given information

Number of samples (n) =230

Mean of the samples =32.6

Standard deviation of the sample =7.9

Confidence interval =90%

α=1-0.9=0.1

Step 2

The correct option is b.

To find the critical value of z test is,

Step 3

### Want to see the full answer?

See Solution

#### Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in