Exam 3: Descriptive Statistics II: Additional Descriptive Measures and Data Displays

The data below indicate the number of "green" homes built in 10 selected metropolitan areas during the past year.Determine the 20^th percentile value for the data.

A particular data set follows the bell-shaped pattern of a normal distribution, with a mean of 3.5 minutes and a standard deviation of 1.1 minutes.What proportion of service times will be between 3.5 and 4.6 minutes?

In a box plot, the median of the observations:

Halston Communications (HC) hired 120 new workers last year.This put the company at the first quartile value among all firms in the greater Houston area.Explain what this means.

The interquartile range for a set of data can be described as the range of the middle ___ % of the values in the data set.

Over the past eight years, Sky Western Airlines has increased their sale of seats from 61,000 to 1,440,000.Use the geometric mean to compute the average annual growth rate for Sky Western sales.

When calculating the p^th percentile, if the index i is NOT an integer then take the average of the data values in the i - 1 and i + 1 positions.

The table here shows the total billable hours for 18 audit teams at Winston-Salem Accounting Associates.Use 8, 9, 10, 11, 12, and 13 as your stems and a "leaf unit" of 10,000 to produce a stem-and-leaf diagram for the data. One row in your diagram would be:

The table below shows the number of qualified job applications received by Mt.Tabor Industries after advertising a job opening on Jobs.com.Compute the z-score job E.

The interquartile range is the difference between the 75 percentile and the 25 percentile values in a data set.

A graphical device for depicting the relationship between two quantitative variables is a(n):

Assuming that the interest is compounded annually and no money is withdrawn, what interest rate would be required in order to double your savings in 12 years?

A particular data set follows the bell-shaped pattern of a normal distribution, with a mean of 3.5 minutes and a standard deviation of 1.1 minutes.What proportion of service times will be between 3.5 and 4.6 minutes?

General Motors claims that its new full-size models get 17 mpg (miles per gallon), its mid-size cars get 25 mpg, and its compact cars get 33 mpg.If General Motors sells 138,000 full size models, 291,000 mid-sized cars, and 482,000 light passenger cars, what is the average mileage for the of vehicles sold by the company?

Which of the following is TRUE regarding the covariance?

The table below shows the civilian unemployment rate (%) and the growth rate of GDP (%) in the United States from 2008 to 2012 (Economic Report of the President).Treating the data as a sample, compute the covariance of the two sets of values.

The correlation coefficient is a standardized value that ranges between -1 and +1.

The 50^th percentile of a data set:

The empirical rule states that approximately 95.9% of values in a data set will be within two standard deviations of the mean if the data follows a bell-shaped curve.

The table below shows the number of customer complaints received by the customer service hotline at Kendall Products during the past 6 days.Chebyshev's Rule would predict that at least what percentage of the values in this data set will fall within plus or minus four standard deviations of the mean.