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intinn Chapter 9 (9.1) Name Curtis Smith I) What is the best point estimate for p in order to construct a confidence interval for p? A) P B) H, C) P (D) P 2) When 455 junior college students were surveyed, 115 said that they have previously owned a motorcycle. Find a point estimate for p, the population proportion of students who have previously owned a motorcycle. A) 0.253 B) 0.747 C) 0.231 D) 0.115 1 15 + 455 = 0.2527 C. 7/73 3) When 410 junior college students were surveyed, 197 said they have a passport. a) Obtain a point estimate for the population proportion of junior college students who have a passport. 297 : 470 =0'. 4805 b) Verify that the requirements for constructing a confidence interval about p are satisfied. 410-, 4805. 5195 = 102. 3441 = Is greater than to Each trial is independent and 410 is not less than S'. or c) Construct a 95% confidence interval for the proportion of junior college students that have a passport. Round to the nearest thousandth. E = 1.96 x scurt (. 4805 . . 5195 + 470) = 0.04836 Lower = 0. 472 Upper= 0 . 5 29 d) Interpret the interval. Write a complete sentence with all required information. Of the 470 junior college students 197 had a passport. Leading the point estimate to be 0. 4805 and thee to be 0. 5195. Allowing all the requirements for , to be met. This information allowed the Lower interval to be 0.432 and the Upperas29 together making up e) Construct a 99% confidence interval for the proportion of junior college students that have a passport. . rough ly Round to the nearest thousandth E = 2. 5 75 XSgart (. 4805 . .5195 : 476) =0.0635 Lower = : 417 Upper = , 544