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 lower inner fence?

Based on the box-and-whisker plot, complete the table.

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 approximate value of the 60th percentile for these data is:

Chebyshev's theorem is applicable to:

According to the empirical rule,the percentage of values that fall within three 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 mode of the salaries of these employees 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 mean waiting time,rounded to two decimal places,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 median of these data?

The scores of eight students taking a mathematics test are 87,93,76,7,84,90,95,and 93.The best measure of central tendency in this case is the:

The percentile rank of a value in a data set is 43.This means that:

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 first quartile?

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 first quartile for these data is:

You just dropped an outlier from a data set.The value of the mean:

The summary measure obtained by taking the difference between the minimum and maximum values in a data set is the:

Use the following to answer questions : The times (in minutes)taken by a sample of nine students to complete a statistics test are: 52 47 57 33 39 43 52 41 36 -The standard deviation of these times,rounded to three decimal places,is:

The annual incomes of all MBA degree holders working in Los Angeles have a bell-shaped distribution with a mean of $71,000 and a standard deviation of $8,000.According to the empirical rule,the percentage of MBA degree holders working in Los Angeles who have an annual income of $63,000 to $79,000 is approximately:

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 standard deviation of these data,rounded to two decimal places?

The quantity is called the:

The median of a data set is the:

The annual incomes of all MBA degree holders working in Los Angeles have a bell-shaped distribution with a mean of $78,000 and a standard deviation of $11,000.According to the empirical rule,the percentage of MBA degree holders working in Los Angeles who have an annual income of $56,000 to $100,000 is approximately: