# Statistics

A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term average daily sales were \$24,819. A random sample of 40 days during the new ad campaign gave a sample mean daily sale of x(bar)=\$25,910 with sample standard deviation s=\$1917. Does this indicate that the population mean daily sales is now more than \$24,819? Use a 1% level of significance.

1. Use a one-sample z-test.

Ho: µ = 24819 ---> null hypothesis
Ha: µ > 24819 -->alternate hypothesis

z = (sample mean - population mean)/(standard deviation divided by the square root of the sample size)

z = (25910 - 24819)/(1917/√40) = ?

Finish the calculation.

Check a z-table at .01 level of significance for a one-tailed test.
If the z-test statistic exceeds the critical value from the z-table, reject the null and conclude µ > 24819. If the z-test statistic does not exceed the critical value from the z-table, do not reject the null.

I hope this will help get you started.

posted by MathGuru
2. 0.065

posted by Anonymous
3. Bbccvn

posted by Anonymous

First Name

## Similar Questions

1. ### Statistics

A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term mean daily sales were \$24,819. A random sample of 40 days during the new ad campaign gave a sample mean daily sale of
2. ### statistics

1)According to past record the average daily sales for a sporting goods store was \$3456.00. After a new advertising campaign, the manager wants to see if the average daily sales have changed. A random sample of 20 days gives a
3. ### statistics

a sales manager wants to know whether a special promotional campaign is a success. he had the following data-Retail outlets :1 2 3 4 5 6 ; Sales before campaign : 50 48 31 42 28 53 ; Sales after campaign : 56 55 30 45 29 58. Test
4. ### government

Most presidential campaign money during the general election is spent on: A. maintaining a campaign staff. B. television advertising. C. mass mailing of campaign literature. D. staging of personal appearances. I THINK IT'S B
5. ### Statistics: Two Sample Population Confidence Inter

Two Sample Population Confidence Interval: Before an intensive TV advertising campaign, the producers of Nike athletic shoes find that 30 of a random sample of 217 upper-income adults were aware of their new leisure shoe line. A
6. ### Government

Im reading about the oublic and campaign finance reform and how many candidates have talked about campaign finance reform but nothing has really changed. Many say that poltical contributions have too much influence on elections
7. ### PHI 105

Assignment: Political Campaign Ads  Due Date: Day 7 [Individual] forum  Create a political campaign ad (a poster, a flier, etc.) for two political parties: one party that supports traditional moral and political
8. ### STAT

You have been hired as a consultant for a company that would like to start a new marketing campaign to increase their online sales. They have given you data for 840 of their customers and would like to know who they should target
9. ### Statistics

As part of a fund raising campaign, the 12 members of the governing board of an organization pledge to raise \$100,000. In the first month of the campaign, the average amount raised by the 12 board members is \$5,200. How much more
10. ### philosophy

Create a political campaign ad (a poster, a flier,etc.) for two political parties: one party that supports traditional moral and politcal philosophies and another party that supports modern moral and political philosophies. For

More Similar Questions