## Calculate the mean, standard deviation, skew, 5-number summary, and interquartile range (IQR) for each of the variables.

In preparation for writing your report to senior management next week, conductthe following descriptive statistics analyses with Excel®. Answer the questions below in your Excel sheet or in a separate Word document:

· Insert a new column in the database that corresponds to “Annual Sales.” Annual Sales is the result of multiplying a restaurant’s “SqFt.” by “Sales/SqFt.”

· Calculate the mean, standard deviation, skew, 5-number summary, and interquartile range (IQR) for each of the variables.

· Create a box-plot for the “Annual Sales” variable. Does it look symmetric? Would you prefer the IQR instead of the standard deviation to describe this variable’s dispersion? Why?

· Create a histogram for the “Sales/SqFt” variable. Is the distribution symmetric? If not, what is the skew? Are there any outliers? If so, which one(s)? What is the “SqFt” area of the outlier(s)? Is the outlier(s) smaller or larger than the average restaurant in the database? What can you conclude from this observation?

· What measure of central tendency is more appropriate to describe “Sales/SqFt”? Why?

### consider doing a market research study to forecast demand for the office units prior to beginning construction.

Dante Development Corporation is considering bidding on a contract for a new office building complex. Figure 4.17 shows the decision tree prepared by one of Dante’s analysts. At node 1,….

### Test the claim that there is a difference in times between two trials.

Mental measurements of young children are often made by giving them blocks and telling them to build a tower as tall as possible. One experiment of block building was repeated….

### Identify the distribution of X—name and parameter(s).

1. When local calls are made in NYC, 60% go through on the first try, and the rest get a busy signal. (We assume there is no third possibility). Let….