Week 5 (3-4)

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American Military University *

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302

Subject

Statistics

Date

Feb 20, 2024

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Uploaded by Philly040404

. ChatGPT @ Week 5 Knowledge Check Homework Practice Questions < Back to Content = Week 5 Knowledge Check Homework Practice Questions @ @ Question 3 1/1 point A researcher would like to estimate the proportion of all children that have been diagnosed with Autism Spectrum Disorder (ASD) in their county. They are using 95% confidence level and the CDC national estimate that 1 in 68 = 0.0147 children are diagnosed with ASD. What sample size should the researcher use to get a margin of error to be within 2%? Round up to the nearest integer. Answer 140 v ¥ Hide question 3 feedback Z-Critical Value = NORM.S.INV(.975) = 1.96 n= .0147 % 9853 * 1.967 022 Question 4 1/ 1 point The FDA regulates that fresh Albacore tuna fish that is consumed is allowed to contain 0.82 ppm of mercury or less. A laboratory is estimating the amount of mercury in tuna fish for a new company and needs to have a margin of error within 0.03 ppm of mercury with 95% confidence. Assume the population standard deviation is 0.138 ppm of mercury. What sample size is needed? Round up to the nearest integer. Answer: ___ 82 _ v ¥ Hide question 4 feedback Z-Critical Value = NORM.S.INV(.975) = 1.96 SD? x Z2 ME? e .1382% % 1.962 .032 Question 5 1/ 1 point The population standard deviation for the height of college basketball players is 3 inches. If we want to estimate a 99% confidence interval for the population mean height of these players with a 0.5 margin of error, how many randomly selected players must be surveyed? (Round up your answer to nearest whole number) Answer: 239 v w Hide question 5 feedback 7-Critical Vialua = NORM SINV/( QQR) = 2 878

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