Solution-What sample size needed for estimate percentage

What sample size needed for estimate percentage points

Reference no: EM13128608

Carbon Monoxide From a random sample of 1201 Americans, it was discovered that 1139 of them lived in neighborhoods with acceptable levels of carbon monoxide [from data obtained by the Environmental Protection Agency].

(a) Obtain a point estimate for the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide.
(b) Construct a 99% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide.
(c) Suppose you wish to conduct your own study to determine the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide. What sample size would be needed for the estimate to be within 1.5 percentage points with 90% confidence if you use the estimate obtained in part (a)?
(d) Suppose you wish to conduct your own study to determine the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide. What sample size would be needed for the estimate to be within 1.5 percentage points with 90% confidence if you do not have a prior estimate?

Reference no: EM13128608

Questions Cloud

The meaning of research : the meaning of research

How the act has attempted to change human behavior : The Sarbanes-Oxley Act of 2002 (SOX) was the catalyst for significant changes in the accounting profession and financial world. One objective of SOX was to deter fraudulent activity within an organization.

Question regarding related rates : Two carts A and B are connected by a rope 39 feet long that passes over pulley P. The point Q is on the floor directly beneath P and between the carts. Cart A is being pulled away from Q at a speed of 2 ft/sec.

Basics of noncallable bonds : If a company's tax rate increases but the YTM of its noncallable bonds remains the same, the after-tax cost of its debt will fall. Why do you think this is a correct statement?

What sample size needed for estimate percentage points : What sample size would be needed for the estimate to be within 1.5 percentage points with 90% confidence if you do not have a prior estimate?

Question regarding maximizing area : Find the dimensions of the rectangle of the largest area that has its base on the x axis and its other two vertices above the x axis and lying on the parabola y=8-x^2.

Twice differentiable function : We are learning Rolle, Lagrange, Fermat, Taylor Theorems in our Real Analysis class. We just finished continuity and are now studying differentiation.

Appreciated property without gain recognition : Relative to corporate formation, how one can contribute appreciated property without gain recognition to the Transferor?

What volume of 4.7 m naoh is required : What volume of 4.7 M NaOH is required to react completely with 1.7 mL of a 1.51 M HCl solution?

User Account

All Pages

What sample size needed for estimate percentage points

Reference no: EM13128608

Reference no: EM13128608

Questions Cloud

Reviews

Write a Review

Basic Statistics Questions & Answers

Statistics-probability assignment

What is the least number

Determine the value of k

What is the probability

Binomial distributions

Caselet on mcdonald’s vs. burger king - waiting time

Generate descriptive statistics

Sampling variability and standard error

Estimate the population mean

Conduct a marketing experiment

Find out the probability

Linear programming models

Assured A++ Grade

Academics

Major Subjects

Majors

Get In Touch

TERMS & POLICIES

HELP & SUPPORT