12.9c
The number of successes and the sample size for a simple random sample from a population are given below. x = 9, n = 36, Ho: p=0.4, H₂: p=0.4, 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 specified hypothesis test. Click here to view a table of areas under the standard normal curve for negative values of z. Click here to view a table of areas under the standard normal curve for positive values of z. A. z= 1.84 (Round to two decimal places as needed.) B. The one-proportion z-test is not appropriate. Identify the critical value(s), if appropriate. Select the correct choice below and, if necessary, fill in the answer box to complete your answer. ⒸA. -Z₁ = 0.0658 (Round to two decimal places as needed.) OB. ±Zα/2 = ± (Round to two decimal places as needed.) Zα = 0.0658 (Round to two decimal places as needed.) O C. O D. The one-proportion z-test is not appropriate.
12.9c
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