Question 59534
1. select the variable “selling price” and find the mean, median, and standard deviation.
The selling price is the 1st figure in each data line.
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2. write a brief summary of the distribution of selling prices. (I can do this but I don't know the variable)using the same variable 
The variable is "selling price".
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3. develop a box plot – estimate the 3rd and 4th quartiles and comment on any outliers 
Same data.  You need to know how to use EXCEL or to enter the data in 
a graphing calculator and generate the box plot.
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4. develop a scatter diagram with price on the vertical axis and size of the home on the horizontal axis. Comment on the relationship you see or don’t see between these two variables. 
Same answer as #3.  You must know how to use EXCEL or a graphing calculator.
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use the mean and standard deviation you computed in #1 above. Use the normal distribution to estimate the percent of homes selling for more than $280.00. Compare this to the actual results. Does the normal distribution yield a good approximation of the actual results?
Standard problem requiring you to convert raw data values to z-values
then using your z-chart to find the required percentage.
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 Show how you arrived at your answer. 
develop an 95% confidence interval for the mean selling price of the homes. Interpret your interval.
your real estate salesperson claims that the average selling price of homes in this area is $225,000. What do think about this claim and why 

Generate the confidence interval and draw your conclusion.
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Cheers,
Stan H.