Question
A survey of 21,250 households concerning telephone service gave the results shown in the table. Landline No Landline Cell phone 12,474 5,844 No cell phone
A survey of 21,250 households concerning telephone service gave the results shown in the table.
Landline
No Landline
Cell phone
12,474
5,844
No cell phone
2,529
403
a. Give a point estimate for the proportion of all households in which there is a cell phone but no landline.
b. Assuming the sample is sufficiently large, construct a 99.9% confidence interval for the proportion of all households in which there is a cell phone but no landline.
c. Give a point estimate for the proportion of all households in which there is no telephone service of either kind.
d. Assuming the sample is sufficiently large, construct a 99.9% confidence interval for the proportion of all households in which there is no telephone service of either kind.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started