How large a sample is required to be accurate in given value

Assignment Help Basic Statistics
Reference no: EM13156241

Teachers' salaries A researcher is interested in estimating the average salary of teachers in a large urban school district. She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to be accurate within $200?

Reference no: EM13156241

Questions Cloud

Which of the physical forces can penetrate water most effect : Which of the physical forces can penetrate water most effectively and can thus be used to locate things in the ocean
Lime reacts with sulfur dioxide to form calcium sulfite : Limestone (CaCO3) is used to remove acidic pollutants from smokestack flue gases. It is heated to form lime (CaO), which reacts with sulfur dioxide to form calcium sulfite
What is kc for the reaction at the temperature : For the reaction: 2NO(g)+2H2(g)-->2H2O(g) at equilibrium in a 4.0L container at 25oC. Suppose 2.5 mol of each component initally is put into the container. At equilibrium 2.5 mol of NO is present. What is Kc for the reaction at the temperature?
Major challenges facing scientists : Once there, watch the videos listed. These videos introduce you to some of the major challenges facing scientists and doctors as they try to combat emerging, highly infectious, and resistant microbes.
How large a sample is required to be accurate in given value : She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to be accurate within $200?
Why is the ocean layered? : Why is the ocean layered? Explain the PHYSICAL CAUSES of layering, and describe the major layers in the ocean. Feel free to include figures.
Prepare a statement of cash flows for sondegaard corporation : Addtl. Info: Investments were sold at a loss (not extraordinary) of $7,000; no equipment was sold; cash dividends paid were $50,000; and net income was $160,000 Prepare a statement of cash flows for 2010 for Sondegaard Corporation.
What do these observations reveal about the mechanisms : XYY humans are fertile males. XXX humans are fertile females. What do these observations reveal about the mechanisms of sex determination and dosage compensation?
Improved organizational communication : Mediated communication and social media (e.g., email, blogs, Facebook, Skype, and Twitter) have played a major role in changing the way that organizations engage in communication with their customers and with employees internally. As we have learn..

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Independent sample t-test for comparison of mean

Serum ferritin is used in diagnosing iron deficiency. In a study conducted recently researchers discovered that in a sample of 28 elderly men the sample standard deviation of serum ferritin was 52.6 mg/L. For 26 younger men the sample standard dev..

  Advantage of personal vehicles to purchase their lunch

Workers drive the company vehicle to purchase lunch versus returning to the office to pick up their personal vehicles in order to purchase their lunch?

  Entering data into spss

Enter data into SPSS (use two columns: one for coding {0, 1, 2, 3, 4, 5} and one for DV)

  Is this binomial experiment urban area will be burglarized

The probability that a house in an urban area will be burglarized is 5%. If 50 houses are randomly selected, what is the probability that one of the houses will be burglarized?

  Alternate hypothesis-improvement on the final examination

We will test to determine if there evidence of an improvement on the final examination, at the 1% significance level. What is the alternate hypothesis?

  Total cholesterol concentration

The total blood cholesterol concentrations, in mg/dL, are shown below for a random sample of six people. In the table below, x is the age of the subject and y is the subject's total cholesterol concentration. Find the 95% prediction interval when ..

  Interval for variance and standard deviation

The percentage rates of home ownership for 8 randomly selected states are listed below. Estimate the population variance and standard deviation for the percentage rate of home ownership with 99% confidence level.

  Computing the mean value for the given data

Computing the mean value for the given data - What is the new mean for the class and frequency distribution graph, what type of graph should be used

  Determine the pearson-s coefficient of skewness

Median $2.4 million, modal sales $2.6 million and standard deviation of distribution is $500,000. Determine the Pearson's coefficient of skewness?

  Create histogram for data using initial class boundary

Draw the histogram for these data using an initial class boundary of and a class width of . Note that you can add or remove classes.

  Find confidence interval for the mean sodium content

Ffinding that the mean sodium content is 324 mg, with a standard deviation of 35 mg. Find a 95 % confidence interval for the mean sodium content of this brand of hotdog.

  Information regarding bay theorem

A special test is given to people complaining of sever headaches. if someone has a brain tumor, the test is positive with a probability of .8 (80%).

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd