Assume simple random sampling. Calculate the variance of the sample mean, 2x for each of the following.

Question:

Assume simple random sampling. Calculate the variance of the sample mean, σ2x for each of the following.
a. N = 1200; n = 80; s = 10
b. N = 1425; n = 90; s2 = 64
c. N = 3200; n = 200; s2 = 129

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Statistics For Business And Economics

ISBN: 9780132745659

8th Edition

Authors: Paul Newbold, William Carlson, Betty Thorne

See More Books

Question Posted: Jul 07, 2015 03:30 AM

See More Questions

Calculate the variance of the following sample. 9 3 7 4 1 7 5 4
Calculate the variance of the following sample. 4 5 3 6 5 6 5 6
Verify that the variance of the sample 4, 9, 3, 6, 4, and 7 is 5.1, and using this fact along with the results of Exercise 8.14, find (a) The variance of the sample 12, 27, 9, 18, 12, and 21; (b) The...
Write code in MATLAB (Radionuclide) (half-life) U-238 4.468 x 10 years U-235 703.8 x 10 years Mo-99 67 hours Tc-99m 6.04 hours Given the formula, where is the decay constant used in , calculate the...
Go online to one of your favorite search engines (Yahoo!, Google, etc.), and enter the following search term: marketing research. From the results, access a directory of marketing research firms....
Suppose that China and Germany each have 1,000,000 labour hours available for the pro- duction of cell phones and computers. The number of labour hours needed to produce cell phones and computers in...
Now compute the biased estimates for the data in Question 4. Data From Question 4 4. For the following set of achievement scores, compute the unbi- ased standard deviation and variance. (Hint: Use...
Moore, Aiken, and Payne is a critical care dental clinic serving the emergency needs of the general public on a first-come, first-served basis. The clinic has five dental chairs, three of which are...
Jim and Kay Ross contributed to the support of their two children, Dale and Kim, and Jim's widowed parent, Grant. For 2022, Dale, a 19-year-old, full-time college student, earned $6,550 as a...
Following are the particulars available for Z and X, LLP Particulars (Rs in 000) retained earnings 860 accounts receivable 250 supplies 150 salaries payable 150 equipment 1500 unearned revenue 200...
A manufacturer bonds a plastic coating to a metal surface. A random sample of nine observations on the thickness of this coating is taken from a week's output, and the thicknesses (in millimeters) of...
Assume simple random sampling. Calculate the 95% confidence interval estimate for the population mean for each of the following. a. N = 1200; n = 80; s = 10; x = 142 b. N = 1425; n = 90; s2 = 64; x =...
Provided are the predecessors, normal time, normal cost, crash time and crash cost for an eight activity (a to h) project?
Find a recent copy of your resume. Does it demonstrate the professional development steps you've taken? If so, where? If not, what can you add, and where would you add this information?
Write a program that prompts a user to enter the name of a file and a word. The program should then count all occurrences of the word in the file and display the number of occurrences. Use a utility...
A company has the following results for the year to 31 March 2018: Trading profits, after capital allowances Bank deposit interest (account opened 1 April 2017): Received 30 June 2017 Received 31...
Develop a program to store names in a one-dimensional array. The program should initially create a one-dimensional array which holds ten String values. As the user enters names one by one, each name...
How are first, second and percentage differences used to determine a model?
What are the highest and lowest historical interest rates for bankers acceptances? Go to www.economagic.com and follow the Interest Rates link. Find the highest and lowest interest rates for one-,...
On October 1, 2021, Adoll Company acquired 2,600 shares of its $1 par value stock for $38 per share and held these shares in treasury. On March 1, 2023, Adoll resold all the treasury shares for $34...
A taxpayer makes the following acquisitions of preference shares in Muvax Ltd: No further shares are acquired during 2023 or 2024. How will the following disposals be matched against these...
The weekly demand (in cases) for a particular brand of automatic dishwasher detergent for a chain of grocery stores located in Columbus, Ohio, follows. a. Construct a time series plot. What type of...
The following table reports the percentage of stocks in a portfolio for nine quarters from 2007 to 2009. Quarter Stock % 1st2007 ............ 29.8 2nd2007 ............ 31.0 3rd2007 ............ 29.9...
To avoid a monthly service fee in an interest-bearing checking account, customers must maintain a minimum average daily balance. Bankrate's 2008 survey of 249 banks and thrifts in the top 25...
Discuss (1) your own results below. Are you motivated by achievement, power, or affiliation? Is there anything that surprised you? How do you think your motivations influence the way that you lead or...
Think of a position you currently have or had. Using the Expectancy Questionnaire, and the Analysis Form,rate each of the three areas on the dimension. For example, for item one think of the amount...
1. Compare and contrast the role of the project manager and the functional or operational managers. 2. What is the role of the project manager in terms of responsibility, accountability and authority...

Assume simple random sampling. Calculate the variance of the sample mean, 2x for each of the following.

Question:

Step by Step Answer:

a b c ...View the full answer

Statistics For Business And Economics

Students also viewed these Statistics questions