Questions from Business Statistics

Q: For the experience numbers: a. Construct a histogram.

For the experience numbers: a. Construct a histogram. b. Describe the shape of the distribution. c. Summarize the distribution in general terms.

Q: Using the data from Table 2.6.8 of Chapter

Using the data from Table 2.6.8 of Chapter 2 for daily values for the Dow Jones Industrial Average: a. Find the standard deviation of the net change. b. Find the range of net change. c. Find the stand...

Q: Consider interest rates on accounts at a sample of local banks:

Consider interest rates on accounts at a sample of local banks: 3.00%, 4.50%, 4.90%, 3.50%, 4.75%, 3.50%, 3.50%, 4.25%, 3.75%, 4.00% a. Find the standard deviation of these interest rates. b. What doe...

Q: Consider the percentage change in the value of the dollar with respect

Consider the percentage change in the value of the dollar with respect to Asia-Pacific currencies, year-to-date as of mid-October 2015 (Table 5.5.7). a. Find the standard deviation of these percentage...

Q: Here are weights of recently produced sinks: 20.8

Here are weights of recently produced sinks: 20.8, 20.9, 19.5, 20.8, 20.0, 19.8, 20.1, 20.5, 19.8, 20.3, 20.0, 19.7, 20.3, 19.5, 20.2, 20.2, 19.5, 20.5 Find the usual summary measure that tells approx...

Q: Consider the average price of a hotel room in 21 U.

Consider the average price of a hotel room in 21 U.S. cities (Table 5.5.8) for the first half of 2015. a. Find the average price of a major-city hotel room in the United States, based on this data set...

Q: Consider the dollar value (in thousands) of gifts returned to

Consider the dollar value (in thousands) of gifts returned to each of your department stores after the holiday season (Table 5.5.9). a. Compute the sample standard deviation. b. Interpret the standard...

Q: Airline ticket prices are generally optimized for the airline’s benefit, not

Airline ticket prices are generally optimized for the airline’s benefit, not for the consumer’s benefit. On July 8, 2010, at the online travel agency website http:// www.expedia.com, the following air...

Q: Your costs had been forecast as having an average of $138

Your costs had been forecast as having an average of $138,000 with a standard deviation of $35,000. You have just learned that your suppliers are raising prices by 4% across the board. Now what are th...

Q: For the previous problem, compare the coefficient of variation before and

For the previous problem, compare the coefficient of variation before and after the price increase. Why does it change (or not change) in this way? Data from Problem 28: Your costs had been forecast...