Textbook Notes (363,103)
QMS 202 (10)
Chapter 10

# Chapter 10 Confidence interval estimation part 2.docx

3 Pages
180 Views

School
Ryerson University
Department
Quantitative Methods
Course
QMS 202
Professor
Boza Tasic
Semester
Winter

Description
10.3 Confidence interval estimation for the proportion • Estimating the proportion of items in a population having a certain characteristics of interest. • The unknown population proportion is represented by π. The point estimate for π is the sample proportion p=X/n, where n is the sample size and X is the number of items in the sample having the characteristics of interest. • You can use the confidence interval estimate of the proportion defined in equation to estimate the proportion of sales invoices that contains errors. • Equation contains a Z statistic because you can use the normal distribution to approximate the binomial distribution when the sample size is sufficiently large. 10.4 Determining sample size Sample size determination of the mean: • To compute the sample size, you must know three factors: 1) The desired confidence level, which determines the value of Z, the critical value from the standardize normal distribution 2) The acceptable sampling error 3) The standard deviatio
More Less

Related notes for QMS 202

OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Join to view

OR

By registering, I agree to the Terms and Privacy Policies
Just a few more details

So we can recommend you notes for your school.