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The highway speeds of 100 cars are summarized in the frequency distribution below. If you construct a histogram from the frequency data, does the distribution appear to be skewed, normal (bell-shaped), or uniform?
Which score has the higher relative position: a score of 55 on a test for which the mean is 43 and s=10, a score of 5 on a test for which the mean is 4 and s=.8 or a score of 435.5 on a test for which the mean is 396 and s=44?
The following data sets give the ages in years of a sample of cars in a faculty parking lot and a student parking lot.
Faculty: 2 3LOL24332L
student: 5 6 8 2 7 LO 1 4 6 10 9
It appears from the data that the following is true:
What would be the highest level of measurement for a salesperson's performance: Below average, average, above average?
The race speeds for the top ei8ht cars in a 200-mile race are listed below. Use the range rule of thumb to find the standard deviation.
189.1 185.9 L89.2182.4175.6 784.2 L88.3 177.2
What would be the highest level of measurement to describe the names of a company's new products?
What would be the highest level of measurement for the room temperature in a CEO'S office?
Television station WXYZ wants to know the proportion of ry owners in Virginia who watch the station's new program at least once a week. The station asked a group of 1000 TV owners in Virginia if they watch the proBram at least once a week. 500, or 50%, responded they do watch the program at least once a week. The population of this study is
Three men are trying to make the football team as punters. The coach had each of them punt the ball 50 times and distances recorded. The mean, median, and standard deviation for each punter is recorded below. Which punter appears to be the most consistent?
The annual numbers of arson crimes for a random sample of 12 California suburban areas of about the same size are:
The colors of dogs at a dog show is an example of which type of data?
A polling firm, hired to estimate the likelihood of the passage of an up-coming referendum, obtained the set of survey responses to make its estimate. The encoding system for the data is: o=FoR, 1=AGAINST. Lf the referendum were held today, estimate the probability that it would pass.
Which of the following could not be a probability?
Frank's Furniture employees earned the following amounts last week:
s37s.s1 s339.04 s180.97 s421.73 ss16.s6
s370.13 s466.92 s15s.2s s457.10
What was the mean amount earned by an employee last week?
Use z-scores to determine whether the value is unusual. Consider a score unusual if it is < -2.00 or > 2.00 A weight of 225 pounds among a population having a mean weight of 161 pounds and a standard deviation of 23 pounds.
A class of sixth grade students kept accurate records on the amount of time they spent playing video games during a one-week period. The times (in hours) are listed below:
Find the variance:
4, 11, 11, 2, 8
When designing a new thrill ride for an amusement park, the designer must consider the sitting heights of males. Listed below are the sitting heights (in millimeters) obtained from a simple random sample of adult males. Use the given sitting heights to construct a frequency distribution. Use a class width of 10 mm and use 870 mm as the lower class limit of the first class.
Use the data above on sitting heights. Use your frequency table to construct a histogram. Based on the result, does the distribution appear to be uniform, normal (bell-shaped), or skewed?
A company performs quality control on its juice bottles. It find that the volumes of juice in its 16 ounce bottles have a mean of 16.3 ounces and a standard deviation of 0.09 ounces. Use the range rule of thumb to estimate the minimum and maximum “usual” volumes.
- 8 years ago
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