A department of education reported that in 2007,
63% of students enrolled in college or a trade school within 12 months of graduating from high school. In 2013, a random sample of 320 individuals who graduated from high school 12 months prior was selected. From this sample, 204 students were found to be enrolled in college or a trade school. Complete parts a through c below.
a. Construct a 90% confidence interval to estimate the actual proportion of students enrolled in college or a trade school within 12 months of graduating from high school in 2013.
A 90% confidence interval to estimate the actual proportion has a lower limit of ____and an upper limit of ____.
(Round to three decimal places as needed.)
Sample proportion = 204 / 320 = 0.6375
90% confidence interval for p is
- Z * sqrt( ( 1 - ) / n) < p < + Z * sqrt( ( 1 - ) / n)
0.6375 - 1.645 * sqrt( 0.6375 * 0.3625 / 320) < p < 0.6375 + 1.645 * sqrt( 0.6375 * 0.3625 / 320)
0.593 < p < 0.682
A 90% confidence interval to estimate the actual proportion has a lower limit of 0.593 and and
upper limit of 0.682
A department of education reported that in 2007, 63% of students enrolled in college or a...
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answer B A department of education reported that in 2007, 66% of students enrolled in college or a trade school within 12 months of graduating from high school. In 2013, a random sample of 320 individuals who graduated from high school 12 months prior was selected. From this sample, 236 students were found to be enrolled in college or a trade school. Complete parts a through c below. a. Construct a 95% confidence interval to estimate the actual proportion of...
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