# Question: Consider the number of gifts lifetime gifts previous to this

Consider the number of gifts (lifetime gifts, previous to this mailing) given by the 20,000 people represented in the donations database (on the companion site).

a. Find the average and standard deviation.

b. Draw a histogram for this data set. Indicate the average and standard deviation on this graph.

a. Find the average and standard deviation.

b. Draw a histogram for this data set. Indicate the average and standard deviation on this graph.

## Answer to relevant Questions

Let’s compare the distribution of the number of lifetime gifts of those who made a current donation to that of those who did not. We will use two data sets, each indicating the number of gifts (lifetime gifts, previous to ...Here are rates of return for a sample of recent on-site service contracts: a. Find the average and standard deviation of these rates of return. b. Write a paragraph discussing the level of risk (a cost) and average return (a ...Here are first-year sales (in thousands) for some recent new product introductions that are similar to one you are considering. 10, 12, 16, 47, 39, 22, 10, 29 a. Find the average and standard deviation. Interpret the ...Using the data from Table 3.9.4 for the portfolio investments of CREF in aerospace and defense: a. Find the standard deviation of portfolio value for these firms’ stock in CREF’s portfolio. b. Find the range of these ...Consider the number of executives for all Seattle corporations with 500 or more employees:19 a. Find the average number of executives per firm. b. Find the (sample) standard deviation, and briefly interpret this value. c. ...Post your question