Question

dh A survey of 160 students is selected randomly on a large university campus. They are asked if they use a laptop in class to take notes. The result of the survey is that 80 of the 160 students responded "yes." An apprornate 95% confidence interval is (0 423, 0.577). Complete parts a through d below. a) How would the confidence interval change if the confidence level had been 90% instead of 95%? The new confidence interval would be (Round to three decimal places as needed.) b) How would the contidence interval change if the sample size had been 240 instead of 160? (Assume the same sample proportion.) The new contidence interval would be D The new confidence interval would be□-The new corldence interval would be CU) Round to three decimal places as needed) c)How would the confdence interval change if the confdence level had been 98% instead of 96%? The new confidence interval would be The new confidence interval would be (Round to three decimal places as needed) d)How large would tho sample size have to be to make the margn of error half as big in the 95% oofdence menar? The new sample size would have to be Enter your answer in each of the answer boxes.

Answer 1

760 오 Or ProportHon Mv 60 or,6.5 ±0.065 IThe n adao (0.435, 0.56 n= 240 24匹 ト+ hi or, o. 333 土1.96 |o.333 x o. 667 24o Or, 0.323 ±0.0586 (0.013t, 0. 393) or, 0.933 + 2.33xo 9330-662

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