## Virtual Tourist provides ratings for hotels throughout the world. Ratings

Virtual Tourist provides ratings for hotels throughout the world. Ratings provided by 649 guests at the Sheraton Anaheim Hotel, located near the Disneyland Resort in Anaheim, California, can be found in the file Hotel Ratings (Virtual Tourist website, February 25, 2013). Possible responses were Excellent, Very Good, Average, Poor, and Terrible.,a. Construct a frequency distribution.,b. Construct a percent frequency distribution.,c. Construct a bar chart for the percent frequency distribution.,d. Comment on how guests rate their stay at the Sheraton Anaheim Hotel.,e. Results for 1679 guests who stayed at Disney’s Grand Californian provided the following frequency distribution., Rating Frequency,Excellent ………………………. 807,Very Good …………………….. 521,Average ………………………… 200,Poor ……………………………. 107,Terrible ………………………… 44,Compare the ratings for Disney’s Grand Californian with the results obtained for the Sheraton Anaheim Hotel.

## What is the best line through the following data?

What is the best line through the followingdata?

## Virtually all inventory control systems are automated. Not surpr

Virtually all inventory control systems are automated. Not surprisingly, there is a lot of software for the routine calculations. Figure shows the printout from a computer program that has done some basic calculations. How can managers use such information? What features would you expect to see in commercial inventory management software? Do a survey to compare availablepackages.

## Variance is often used to measure quality in production-line products.

Variance is often used to measure quality in production-line products. Suppose that a sample of steel rods that are supposed to be exactly 100 cm long is taken. The length of each is determined, and the results are recorded. Calculate the variance and the standard deviation. Briefly describe what these statistics tell you.

## Using the matrices in Problem M5-10, determine which of the

Using the matrices in Problem M5-10, determine which of the following operations are possible. If the operation is possible, give the size of the resulting matrix.,(a) B x C,(b) C x B,(c) A x B,(d) C x D,(e) D x C

## The Air Transport Association of America publishes figures on th

The Air Transport Association of America publishes figures on the busiest airports in the United States. The following frequency distribution has been constructed from these figures for a recent year. Assume these are population data.,Number of Passengers,Arriving and Departing Number of,(millions) Airports,20–under 30 ……………………………. 8,30–under 40 ……………………………. 7,40–under 50 ……………………………. 1,50–under 60 ……………………………. 0,60–under 70 ……………………………. 3,70–under 80 ……………………………. 1,a. Calculate the mean of these data.,b. Calculate the mode.,c. Calculate the median.,d. Calculate the variance.,e. Calculate the standard deviation.

## The 2000 U.S. Census asked every household to report information

The 2000 U.S. Census asked every household to report information on each person living there. Suppose for a sample of 30 households selected, the number of persons living in each was reported as follows.,Compute the mean, median, mode, range, lower and upper quartiles, and interquartile range for thesedata.

## The 2000 U.S. Census also asked for each person’s age.

The 2000 U.S. Census also asked for each person’s age. Suppose that a sample of 40 households taken from the census data showed the age of the first person recorded on the census form to be as follows.,Compute P10, P80, Q1, Q3, the interquartile range, and the range for thesedata.

## Telemarketers generally read from a prepared script when they make

Telemarketers generally read from a prepared script when they make their sales calls. A firm decides to change this prepared script, making it both friendlier and shorter. Daily sales are recorded for a random sample of telemarketers, before and after the script change. The average difference-using a [(before the change) – (after the change)] order of subtraction-is + 4.2, with a sample size of 56. The differences have a standard deviation of 23.4. Do the data suggest that there is a difference in daily sales before and after the script change? Use ? = 0.05. What assumption do you have to make in order to answer this question?