A study was undertaken to determine if the amount of daily caffeine had an influ
ID: 3360178 • Letter: A
Question
A study was undertaken to determine if the amount of daily caffeine had an influenced on the probability of a miscarriage in pregnant women. The amount of caffeine ingested in a day was broken down into none, some but < 200 mg, and > 200 mg. We will focus on the number and proportion for women who consumed more than 200 mg of caffeine a day. The data are shown below.
If the proportion of women who consumed more than 200 mg of caffeine a day who had a miscarriage is .25 (41/164), what is the z-value to use for a 90% Confidence Interval for this estimated proportion.
Miscarriage Caffeine Yes No Row Total None 32 232 264 < 200 mg 99 536 635 > 200 mg 41 123 164 Column Total 172 891 1063Explanation / Answer
z-value to use for a 90% Confidence Interval is 1.645 which is option C. thus C is the correct answer.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.