Question: Let us suppose that the data from Table 3.8 were obtained from a stratified random sample of the 1200 workers in the plant in which

Let us suppose that the data from Table 3.8 were obtained from a stratified random sample of the 1200 workers in the plant in which the workforce was stratified according to pulmonary Stressors (high, medium, low) and that proportional allocation was used to allocate the sample.

a. How many workers are there in each stratum?

b. Estimate the mean forced vital capacity among the workers in the plant.
How does this estimate differ from the mean that would have been obtained if the sample had been taken by simple random sampling?
Obtain a 95% confidence interval for the population mean.

d. What is the gain from stratified random sampling over what would have been obtained from simple random sampling?

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Statistical Sampling To Auditing Questions!

Q #1 Isabel Briggs Myers was a pioneer in the study of personality types. The personality types are broadly defined according to four main preferences. Do married couples choose similar or different...

21 Teaching sustainability in business schools Why, what and how Bob Willard University of Toronto, Canada Business is the direct or indirect cause of most ecological challenges, but it is becoming...

MS1023 Business Statistics with Computer Applications MS1023 Business Statistics w/Comp Apps I Homework #3 - Use Red Par Score Form Chp. 7: Questions 1-50 1. Kristen Ashford purchased the subscribers...

STAB22H3 Statistics I 2020 1.A researcher used a linear regression model to investigate the relationship between sexually transmitted disease rate (y) and poverty rate (x) in the U.S.A. The...

e Let Us Try! 0' Hello! I hope you are having a good day. Before proceeding to Lesson 1, try to read and answer the activity below rst. Direction: Choose the letter of the correct answer and write...

Business Research Methodology- Question Bank 1 1. When the marketing department of an organization attempts to determine the amount of time the managers in this department spend at their computers in...

Business Research MethodologyQuestion Bank 1 1. When the marketing department of an organization attempts to determine the amount of time the managers in this department spend at their computers in...

Set Student Name: 1. Describe the relationship between two variables that have a correlation coefficient value: a. Near -1 b. Near 0 c. Near 1 2. Data was collected where a weightlifter was asked to...

Instuctor's Annotated Edition TENTH EDITION Understandable Statistics Concepts and Methods Charles Henry Brase Regis University Corrinne Pellillo Brase Arapahoe Community College Australia Brazil...

Describe how you will review the purchases and payments system. (consider a good purchase and payment system in a big organization). Axon Bhd employs several hundred employees at its production site,...

A man has 200 acres of land. He produces three vegetables eggplant, carrot, and green peas. Average yield per acre for eggplant, carrot, and green peas are 2000, 4000 and 2000 kg respectively....

ans When constructing a quick review table in Excel, knowing the formula is essential in populating the cells correctly. Using the Holt exponential smoothing method, complete the following table for...

A loan payment of $1000 was due 60 days ago, and another payment of $1200 is due 30 days from now. What single payment 90 days from now will pay off the two obligations if interest is to be 8% and...