Question 1

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:

Accepted Answer

A) 91.84 
B) 83.67 
C) 87.34 
D) 93.84

Question 2

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:

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 3

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?

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 4

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:

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 5

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

Accepted Answer

A) mean 
B) range 
C) mode 
D) median

Question 6

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:

Accepted Answer

A) 75% 
B) 68% 
C) 95% 
D) 62%

Question 7

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:

Accepted Answer

A) 32 
B) 27 
C) 29 
D) 35

Question 8

The percentiles divide a ranked data set into:

Accepted Answer

A) 2 equal parts 
B) 4 equal parts 
C) 100 equal parts 
D) 10 equal parts

Question 9

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:

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 10

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:

Accepted Answer

The answer of Use the following to answer questions :
You...

Question 11

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:

Accepted Answer

A) 88.89 
B) 77.78 
C) 84.39 
D) 90.89

Question 12

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?

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 13

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:

Accepted Answer

A) 87.50 
B) 95.75 
C) 89.25 
D) 93.75

Question 14

The mean of a data set is the:

Accepted Answer

A) value of the middle term in a ranked data set 
B) sum of all values divided by the number of values 
C) difference between the maximum and minimum values 
D) average of the deviations of values from the average

Question 15

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:

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 16

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

Accepted Answer

A) the values of the mean,median,and mode are the same 
B) the mean is greater than the median,which is greater than the mode 
C) the mean and median are equal,but the mode is different 
D) the mode is greater than the median,which is greater than the mean

Question 17

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?

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 18

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:

Accepted Answer

The answer of Use the following to answer questions :
The...

Question 19

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:

Accepted Answer

The answer of Use the following to answer questions :
You...

Question 20

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:

Accepted Answer

The answer of Use the following to answer questions :
The...

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:

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 : 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: