Exam 3: Numerical Descriptive Measures

The mean age of all high school teachers in New York state is 50 years and the standard deviation is 7 years.According to Chebyshev's theorem,the percentage of teachers in New York who are 25.5 to 74.5 years old is at least:

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 range of these salaries 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 -Are there any outliers in this data set? If so,what are they?

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 third quartile for these data is:

Which of the following is the only measure that can be calculated for qualitative data?

The ages of all high school teachers in New York state have a bell-shaped distribution with a mean of 39 years and a standard deviation of 7 years.According to the empirical rule,the percentage of teachers in this state who are 32 to 46 years old is approximately:

The mean age of five members of a family is 40 years.The ages of four of the five members are 61,60,27,and 23.The age of the fifth member is:

The percentiles divide a ranked data set into:

Use the following to answer questions : The temperatures (in degrees Fahrenheit)observed during seven days of summer in Los Angeles are: 78 99 68 91 105 75 85 -The variance of these temperatures,rounded to three decimals,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 standard deviation of waiting times,rounded to two decimal places,is:

The mean age of all high school teachers in New York state is 41 years and the standard deviation is 6 years.According to Chebyshev's theorem,the percentage of teachers in New York who are 23 to 59 years old is at least:

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 range of these data?

The mean income of all MBA degree holders working in Los Angeles is $65,000 per year and the standard deviation of their incomes is $8,000 per year.According to Chebyshev's theorem,the percentage of MBA degree holders,working in Los Angeles,with an annual income of $33,000 to $97,000 is at least:

The mean of a data set is the:

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 standard deviation of these salaries,rounded to the nearest dollar,is:

If a data set is right-skewed with one peak in the histogram,then which of the following is true?

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 third quartile?

Use the following to answer questions : The points scored by a team in five basketball games are as follows: 118 124 77 99 112 -The median for this data set 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 variance of waiting times,rounded to two decimal places,is:

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 variance of these times,rounded to three decimal places,is: