Exam 3: Numerical Descriptive Measures

Use the following to answer questions : The following data represent the ages of 15 people buying lift tickets at a ski area. 15 25 26 17 38 16 74 41 30 24 28 40 20 34 31 -What is the value of the interquartile range?

Use the following to answer questions : The work experiences (in years)of 14 employees of a company are 8 21 11 4 14 17 11 8 8 7 2 11 27 6 -The second quartile for these data is:

According to the empirical rule,the percentage of values that fall outside two standard deviations of the mean is approximately:

According to the empirical rule,the percentage of values that fall within two standard deviations of the mean is approximately:

Use the following to answer questions : The annual salaries of six employees of a company are as follows: $22,000 $35,000 $22,000 $46,000 $57,000 $51,000 -The median salary of these employees is:

Use the following to answer questions : The work experiences (in years)of 14 employees of a company are 8 21 11 4 14 17 11 8 8 7 2 11 27 6 -Which of the following does a box-and-whisker plot not show?

Use the following to answer questions : The following table gives the frequency distribution of prices for a sample of 30 college textbooks. -The standard deviation of the textbook prices,rounded to two decimal places,is:

Let s₁,s₂,and s₃ be the standard deviations of the bell-shaped graphs I,II,and III,respectively.Place them in increasing order.

Use the following to answer questions : The waiting times (in minutes)for 11 customers at a supermarket are: 14 9 15 4 4 7 9 11 14 2 6 -The second quartile for these data is:

Use the following to answer questions : You have just recorded the waiting times for a random sample of 50 customers who visited Elmo's Pizza Shop.The following table gives the frequency distribution of waiting times (in minutes)for these customers. -The value of is:

A numerical measure calculated from population data is called a(n):

Use the following to answer questions : Data concerning the time between failures (in hours of operation)for a computer printer have been recorded,and the first quartile equals 38 hours,the second quartile equals 59 hours,and the third quartile equals 87 hours. -The value for the lower inner fence equals

The ages of all high school teachers in New York state have a bell-shaped distribution with a mean of 45 years and a standard deviation of 7 years.According to the empirical rule,the percentage of teachers in this state who are 24 to 66 years old is approximately:

The ages of all high school teachers in New York state have a bell-shaped distribution with a mean of 43 years and a standard deviation of 6 years.According to the empirical rule,the percentage of teachers in this state who are 31 to 55 years old is approximately:

Use the following to answer questions : The annual salaries of six employees of a company are as follows: $22,000 $35,000 $22,000 $46,000 $57,000 $51,000 -The mean salary of these employees is:

Use the following to answer questions : The following data represent the ages of 15 people buying lift tickets at a ski area. 15 25 26 17 38 16 74 41 30 24 28 40 20 34 31 -Create a boxplot of the data.Describe the features of the distribution.

Use the following to answer questions : The work experiences (in years)of 14 employees of a company are 8 21 11 4 14 17 11 8 8 7 2 11 27 6 -The approximate value of the 70th percentile for these data is:

Use the following to answer questions : The following data represent the ages of 15 people buying lift tickets at a ski area. 15 25 26 17 38 16 74 41 30 24 28 40 20 34 31 -What is the mean of these data,rounded to two decimal places?

According to the empirical rule,the percentage of values that fall within one standard deviation of the mean is approximately:

An outlier influences which of the following summary measures the most?