# Question: X 40 n 50 95 level a Use the

x = 40, n = 50, 95% level.

a. Use the one-proportion plus-four z-interval procedure, as discussed on page 449, to find the required confidence interval.

b. Compare your result with the corresponding confidence interval found in Exercises 11.17–11.22, if finding such a confidence interval was appropriate.

a. Use the one-proportion plus-four z-interval procedure, as discussed on page 449, to find the required confidence interval.

b. Compare your result with the corresponding confidence interval found in Exercises 11.17–11.22, if finding such a confidence interval was appropriate.

## Answer to relevant Questions

x = 16, n = 20, 90% level. a. Use the one-proportion plus-four z-interval procedure, as discussed on page 449, to find the required confidence interval. b. Compare your result with the corresponding confidence interval ...In the July 2008 article “Americans Favor Offshore Drilling,” B. Rooney reported on a CNN/Opinion Research Corporation poll that asked what Americans think about offshore drilling for oil and natural gas. Of the 500 U.S. ...x = 16, n = 20, H0: p = 0.7, H0: p ≠ 0.7, α = 0.05 a. Determine the sample proportion. b. Decide whether using the one-proportion z-test is appropriate. c. If appropriate, use the one-proportion z-test to perform the ...Of the 38 numbers on an American roulette wheel, 18 are red, 18 are black, and 2 are green. If the wheel is balanced, the probability of the ball landing on red is 18/38 = 0.474. A gambler has been studying a roulette wheel. ...Repeat parts (b)–(e) of Exercise 11.5 for samples of size 4. (There are five possible samples.)Post your question