## 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?

### Run the two-way analysis of variance. Give the results of the hypothesis tests for the main effects and the interaction.

Refer to Exercise 13.43. Additional data collected by the same researchers according to a similar design are given in the PLANTS2 data file. Here, there are two response variables. They….

### Run a separate oneway analysis of variance for each species and summarize the results. Since the amount of water is a quantitative factor, we can also analyze these data using regression.

Perform the tasks described in Exercise 13.46 for the two response variables in the PLANTS2 data file Exercise 13.46 Refer to Exercise 13.43. Run a separate oneway analysis of variance….

### Make a flowchart of this process, making sure to include steps that involve Yes/No decisions

Refer to the previous exercise. The time it takes from deciding to order a sandwich to receiving the sandwich will vary. List several common causes of variation in this time…..