Leigh and Rebekah are each attempting to estimate the proportion of coffee drinkers who consume more than one cup of coffee per day. They each obtain a random sample of coffee drinkers, and, in each sample, the proportion who drink more than one cup of coffee per day is 0.40. Leigh and Rebekah each use their sample data to construct a confidence interval. Leigh’s interval is from 0.346 to 0.474, and Rebekah’s interval is from 0.286 to 0.514. One of these intervals was computed correctly, but the other was not. Which interval must be incorrect? Leigh’s interval must be incorrect.Rebekah’s interval must be incorrect.It’s impossible to answer this question without knowing the level of confidence used for each interval.It’s impossible to answer this question without knowing the sample sizes.It’s impossible to answer this question without knowing the sample sizes or the level of confidence used for each interval.

Given that Leigh and Rebekah construct the confidence interval for coffee drinkers who drink more…

Answered: Leigh and Rebekah are each attempting…

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

Related questions

Question

Leigh and Rebekah are each attempting to estimate the proportion of coffee drinkers who consume more than one cup of coffee per day. They each obtain a random sample of coffee drinkers, and, in each sample, the proportion who drink more than one cup of coffee per day is 0.40. Leigh and Rebekah each use their sample data to construct a confidence interval. Leigh’s interval is from 0.346 to 0.474, and Rebekah’s interval is from 0.286 to 0.514. One of these intervals was computed correctly, but the other was not. Which interval must be incorrect?

Leigh’s interval must be incorrect.
Rebekah’s interval must be incorrect.
It’s impossible to answer this question without knowing the level of confidence used for each interval.
It’s impossible to answer this question without knowing the sample sizes.
It’s impossible to answer this question without knowing the sample sizes or the level of confidence used for each interval.

Expert Solution