question archive Problem 4 El Bookmark this page Quiz due Mar10,2022 05:01 CST Problem 4 1 point possible (graded, results hidden} In a particular county, in one yearJ for mothers who are between 21 and 30 years of age it was found that, of 492 births, 3 were twins
Problem 4 El Bookmark this page Quiz due Mar10,2022 05:01 CST Problem 4 1 point possible (graded, results hidden} In a particular county, in one yearJ for mothers who are between 21 and 30 years of age it was found that, of 492 births, 3 were twins
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Problem 4 El Bookmark this page Quiz due Mar10,2022 05:01 CST Problem 4 1 point possible (graded, results hidden} In a particular county, in one yearJ for mothers who are between 21 and 30 years of age it was found that, of 492 births, 3 were twins. Find a 99% confidence interval for the proportion of twin births among the population of mothers in this age range represented by this sample. Then subtract the two endpoints of the interval to report the length of the interval to answer here. O 0.012 O 0.016 O 0.018 O 0.021 O 0.031 Submit
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Answer = 0.031
Step-by-step explanation
Given 1 = 492 and No ang terms = 8. Proportion my twins, p= /492 = 0.0163 Confidence interval P + 2 x x P ( 1 - P ) for proportions 2 2x at 99% = 2:575 ( Read from table ) 2 Therefore CI= 0. 0163 + 2.575 * 0.0163 (1-0. 0163) 492 0.0016, 0. 031 THEfor 0 031 - 0.0016 = 0. 029 0 . 020
