Exam 3: Describing Data: Numerical Measures

Listed below is the average earnings ratio by sex for full-year, full-time workers from 1999 to 2008. (Source: Adapted from Statistics Canada-see Connect for data file.) What were the median earnings for men for the years 1999-2008?

Determine the age of the youngest person who died in this sample.

A box plot shows

A disadvantage of using an arithmetic mean to summarize a set of data is

The closing prices of a common stock have been 61.5, 62, 61.25, 60.875 and 61.5 for the past week. What is the range?

Listed below is the box plot of average earnings ratio for full-year, full-time male workers from 1999 to 2008. From this we can interpret that the third quartile of average earnings for men for the years 1999-2008 was approximately:

What is a disadvantage of the range as a measure of dispersion?

If there are an odd number of observations in a set of ungrouped data that have been arrayed from low to high or vice versa, where is the median located?

Listed below is the box plot of average earnings ratio for full-year, full-time female workers from 1999 to 2008. From this we can interpret that the distribution of average earnings for women for the years 1999- 2008 was:

i. An outlier is a data point that always occurs in the first quartile. ii. A student scored in the 85 percentile on a standardized test. This means that the student scored higher than 85% of the rest of the students taking the test. Iii) The interquartile range is the difference between the values of the first and third quartile, indicating the range of the middle fifty percent of the observations.

A sample of the homes currently offered for sale revealed that the mean asking price is $75,900, the median $70,100 and the modal price is $67,200. The standard deviation of the distribution is $5,900. The Pearson's coefficient of skewness is _______.

Which measure of central tendency is found by arranging the data from low to high, and selecting the middle value?

The ________(measure of central tendency) cannot be determined if the distribution has an open- ended class.

The weights of a sample of 100 boxes being shipped by Air France from Toronto to Paris are: -The variance for laminate flooring is____________ .

A purchasing agent for a trucking company is shopping for replacement tires for their trucks from two suppliers. The suppliers' prices are the same. However, Supplier A's tires have an average life of 60,000 miles with a standard deviation of 10,000 miles. Supplier B's tires have an average life of 60,000 miles with a standard deviation of 2,000 miles. Which of the following statements is true?

The U.S. Department of Education reported that for the past six years 23, 19, 15, 30, 27 and 25 women received doctorate degrees in computer and information sciences. What is the mean arithmetic annual number of women receiving this degree?

i. For salaries of $102,000, $98,000, $45,000, $106,000 and $101,000, the arithmetic mean would be an appropriate average. ii. Extremely high or low scores do not affect the value of the median. Iii) Three persons earn $8 an hour, six earn $9 an hour, and one earns $12 an hour. The weighted mean hourly wage is $9.

A disadvantage of using an arithmetic mean to summarize a set of data is

The ages of all the patients in the isolation ward of the hospital are 38, 26, 13, 41 and 22. What is the population variance?

i. For salaries of $102,000, $98,000, $45,000, $106,000 and $101,000, the median would be an appropriate average. Ii) There are always as many values above the mean as below it. Iii) Three persons earn $8 an hour, six earn $9 an hour, and one earns $12 an hour. The weighted mean hourly wage is $9.