Find z for each of the confidence levels in parts a through, Ask an Expert

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Find z* for each of the confidence levels in parts (a) through (c), and draw a picture similar to given Figure. Then answer part (d).
a. 60%.

b. 86%.

c. 99.8%.

d. On the basis of the values of z* found in parts (a) through (c), explain what happens to the width of the confidence interval when the confidence level is increased.

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