Data: https://drive.google.com/file/d/1rQrDV38tLs7ZQRrDz-npYAppPCTY-3I8/view?usp=sharing

You have been hired by the Regional Real Estate Company to help them analyze real estate data. One of the company's Pacific region salespeople just returned to the office with a newly designed advertisement. It states that the average cost per square foot of his home sales is above the average cost per square foot in the Pacific region. He wants you to make sure he can make that statement before approving the use of the advertisement. The average cost per square foot of his home sales is $275. In order to test his claim, you collect a sample of 1,001 home sales for the Pacific region.

Set Up:

The population parameter is the average cost per square foot of salesperson's home sales. The null hypothesis is that the salesperson's average cost per square foot of his home is more than $275 the average cost per square foot in the Pacific Ocean. The alternative hypothesis is the salesperson's average cost per square foot of his home is less than $275 the average cost per square foot in the Pacific Ocean. The test I will be using is to analyze this is the Z-test and the left tailed because the alternative hypothesis contains the condition of "less than" given quantity.

• Data Analysis Preparations:Describe sample summary statistics, provide a histogram and summary, check assumptions, and find the test statistic and significance level.
• Provide the descriptive statistics (sample size, mean, median, and standard deviation).
• Provide a histogram of your sample.
• Describe your sample by writing a sentence describing the shape, center, and spread of your sample.
• Determine whether the conditions to perform your identified test have been met.
• Calculations:Calculate the p value, describe the p value and test statistic in regard to the normal curve graph, discuss how the p value relates to the significance level, and compare the p value to the significance level to reject or fail to reject the null hypothesis.
• Determine the appropriate test statistic, then calculate the test statistic.
• Note:This calculation is (mean - target)/standard error. In this case, the mean is your regional mean (Pacific), and the target is 275.
• Calculate thepvalue.
• Note:For right-tailed, use the T.DIST.RT function in Excel, left-tailed is the T.DIST function, and two-tailed is the T.DIST.2T function. The degree of freedom is calculated by subtracting 1 from your sample size.
• Choose your test from the following:
• =T.DIST.RT([test statistic], [degree of freedom])
• =T.DIST([test statistic], [degree of freedom], 1)
• =T.DIST.2T([test statistic], [degree of freedom])
• Using the normal curve graph as a reference, describe where the p value and test statistic would be placed.
• Test Decision:Discuss the relationship between the p value and the significance level, including a comparison between the two, and decide to reject or fail to reject the null hypothesis.
• Discuss how thepvalue relates to the significance level.
• Compare thepvalue and significance level, and make a decision to reject or fail to reject the null hypothesis.