Question 1

Find the range for the set of data numbers.
-$26,38,15,50,51$

Accepted Answer

A)  15 
B)  51 
C)  36 
D)  12 
A)  15 
B)  51 
C)  36 
D)  12

Question 2

Assume the distribution is normal. Use the area of the normal curve to answer the question. Round to the nearest whole percent.
-The average runner at a local college runs the mile in 4.5 minutes, with a standard deviation of . 3 minutes. What is the probability that a person will run a mile in less than 4 minutes?

Accepted Answer

A)  $3 \%$ 
B)  $5 \%$ 
C)  $4 \%$ 
D)  $7 \%$ 
A)  $3 \%$ 
B)  $5 \%$ 
C)  $4 \%$ 
D)  $7 \%$

Question 3

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent.
-Greater than 16.1 seconds

Accepted Answer

A)  $2 \%$ 
B)  $14 \%$ 
C)  $15 \%$ 
D)  $16 \%$ 
A)  $2 \%$ 
B)  $14 \%$ 
C)  $15 \%$ 
D)  $16 \%$

Question 4

Construct the specified histogram.
-In a survey, 20 people were asked how many magazines they had purchased during the previous year. The results are shown in the frequency distribution below. Construct a histogram.

Accepted Answer

The answer of Construct the specified histogram.
-In a survey, 20...

Question 5

Find the mean
-The local Tupperware dealers earned commissions last month of $\$ 4430.05, \$ 1756.42, \$ 3553.04$, $\$ 4130.26, \$ 4282.92$, and $\$ 3366.12$.

Accepted Answer

A)  $\$ 4291.76$ 
B)  $\$ 3586.47$ 
C)  $\$ 4303.76$ 
D)  $\$ 5379.70$ 
A)  $\$ 4291.76$ 
B)  $\$ 3586.47$ 
C)  $\$ 4303.76$ 
D)  $\$ 5379.70$

Question 6

Find the mode or modes.
-$20,32,46,32,49,32,49$

Accepted Answer

A)  37.1 
B)  49 
C)  46 
D)  32 
A)  37.1 
B)  49 
C)  46 
D)  32

Question 7

Find the mean for the list of numbers. Round to the nearest tenth.
-$28,520,24,425,21,565,27,525,22,555$

Accepted Answer

A)  $23,959.6$ 
B)  24,918 
C)  24,425 
D)  20,765 
A)  $23,959.6$ 
B)  24,918 
C)  24,425 
D)  20,765

Question 8

Find the standard deviation for the given data.
-To get the best deal on a CD player, Tom called eight appliance stores and asked the cost of a specific model. The prices he was quoted are listed below:
$128 $186 $232 $353 $197 $329 $327 $174
Round results to the nearest ten cents.

Accepted Answer

A)  $\$ 463,684.50$ 
B)  $\$ 185.50$ 
C)  $\$ 84.50$ 
D)  $\$ 513,668.00$ 
A)  $\$ 463,684.50$ 
B)  $\$ 185.50$ 
C)  $\$ 84.50$ 
D)  $\$ 513,668.00$

Question 9

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent.
-Between 14.3 and 16.1 seconds

Accepted Answer

A)  $34 \%$ 
B)  $50 \%$ 
C)  $48 \%$ 
D)  $68 \%$ 
A)  $34 \%$ 
B)  $50 \%$ 
C)  $48 \%$ 
D)  $68 \%$

Question 10

Find the mean
-Six college buddies bought each other Christmas gifts. They spent $\$ 120.62, \$ 197.76, \$ 120.32$, $\$ 160.53, \$ 147.36$, and $\$ 120.34$. Find the mean amount spent for Christmas gifts.

Accepted Answer

A)  $\$ 144.49$ 
B)  $\$ 161.39$ 
C)  $\$ 216.73$ 
D)  $\$ 173.39$ 
A)  $\$ 144.49$ 
B)  $\$ 161.39$ 
C)  $\$ 216.73$ 
D)  $\$ 173.39$

Question 11

Assume the distribution is normal. Use the area of the normal curve to answer the question. Round to the nearest whole percent.
-A machine produces pencils with an average diameter of .30 inches and a standard deviation of .01 inches. What is the probability of a pencil with a diameter less than .285 inches?

Accepted Answer

A)  $8 \%$ 
B)  $9 \%$ 
C)  $7 \%$ 
D)  $6 \%$ 
A)  $8 \%$ 
B)  $9 \%$ 
C)  $7 \%$ 
D)  $6 \%$

Question 12

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent.
-Between 17 and 17.9 seconds

Accepted Answer

A)  $14 \%$ 
B)  $16 \%$ 
C)  $2 \%$ 
D)  $1 \%$ 
A)  $14 \%$ 
B)  $16 \%$ 
C)  $2 \%$ 
D)  $1 \%$

Question 13

Obtain the five number summary for the given data.
-The weekly salaries (in dollars) of sixteen government workers are listed below.
$\begin{array}{lllll}690 & 611 & 813 & 654\end{array}$
$\begin{array}{lllll}728 & 576 & 492 & 624\end{array}$
$\begin{array}{lllll}530 & 678 & 685 & 460 \end{array}$
$\begin{array}{lllll}558 & 787 & 513 & 826 \end{array}$

Accepted Answer

A)  $460,537.00,624,718.5,826$ dollars 
B)  $460,537.00,639.0,718.5,826$ dollars 
C)  $460,544.0,639.0,709 , 826$ dollars 
D)  $460,530,624,690,826$ dollars 
A)  $460,537.00,624,718.5,826$ dollars 
B)  $460,537.00,639.0,718.5,826$ dollars 
C)  $460,544.0,639.0,709 , 826$ dollars 
D)  $460,530,624,690,826$ dollars

Question 14

Find the standard deviation of the data summarized in the given frequency table.
-The test scores of 40 students are summarized in the frequency table below. Find the standard deviation.

Accepted Answer

A)  14 
B)  12.6 
C)  13.3 
D)  12 
A)  14 
B)  12.6 
C)  13.3 
D)  12

Question 15

Find the mean for the list of numbers. Round to the nearest tenth.
-$17,11,4,9,6,1,6$

Accepted Answer

A)  7.2 
B)  9.2 
C)  9 
D)  7.7 
A)  7.2 
B)  9.2 
C)  9 
D)  7.7

Question 16

Construct a boxplot.
-The weights (in pounds) of 30 newborn babies are listed below. Construct a boxplot for the data set.
$\begin{array}{lllllllllll}5.5 & 5.7 & 5.8 & 5.9 & 6.1 & 6.1 & 6.3 & 6.4 & 6.5 & 6.6\end{array}$
$\begin{array}{llllllllll}6.7 & 6.7 & 6.7 & 6.9 & 7.0 & 7.0 & 7.0 & 7.1 & 7.2 & 7.2\end{array}$
$\begin{array}{llllllllll}7.4 & 7.5 & 7.7 & 7.7 & 7.8 & 8.0 & 8.1 & 8.1 & 8.3 & 8.7\end{array}$

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 17

Construct a boxplot.
-The test scores of 32 students are listed below. Construct a boxplot for the data set.
$\begin{array}{lllllllllll}32 & 37 & 41 & 44 & 46 & 48 & 53 & 55\end{array}$
$\begin{array}{lllllllllll}57 & 57 & 59 & 63 & 65 & 66 & 68 & 69 \end{array}$
$\begin{array}{lllllllllll}70 & 71 & 74 & 74 & 75 & 77 & 78 & 79 \end{array}$
$\begin{array}{lllllllllll}81 & 82 & 83 & 86 & 89 & 92 & 95 & 99 \end{array}$

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 18

Find the standard deviation. Round to the nearest tenth.
-$202,253,223,235,202,239,264,150,147$

Accepted Answer

A)  26.6 
B)  41.9 
C)  39.5 
D)  44.8 
A)  26.6 
B)  41.9 
C)  39.5 
D)  44.8

Question 19

Find the mean
-The weight gains (in pounds) over a one month period of 10 patients on a special diet were: 7.7, $-6,2.3,6.5,4.4,-1,6.0,-6,5.3,4.9$. Find the mean. Round your answer to the nearest hundredth.

Accepted Answer

A)  2.41 pounds 
B)  2.30 pounds 
C)  2.54 pounds 
D)  5.01 pounds 
A)  2.41 pounds 
B)  2.30 pounds 
C)  2.54 pounds 
D)  5.01 pounds

Question 20

Solve the problem.
-If the life, in years, of a television set is normally distributed with a mean of 30 years and a standard deviation of 5 years, what should be the guarantee period if the company wants less than $3 \%$ of the television sets to fail while under warranty?

Accepted Answer

A)  Less than 16.25 years 
B)  Less than 39.4 years 
C)  More than 20.6 years 
D)  Less than 20.6 years 
A)  Less than 16.25 years 
B)  Less than 39.4 years 
C)  More than 20.6 years 
D)  Less than 20.6 years

Find the range for the set of data numbers. - $26,38,15,50,51$

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent. -Greater than 16.1 seconds

Construct the specified histogram. -In a survey, 20 people were asked how many magazines they had purchased during the previous year. The results are shown in the frequency distribution below. Construct a histogram.

Find the mean -The local Tupperware dealers earned commissions last month of $\$ 4430.05, \$ 1756.42, \$ 3553.04$ , $\$ 4130.26, \$ 4282.92$ , and $\$ 3366.12$ .

Find the mode or modes. - $20,32,46,32,49,32,49$

Find the mean for the list of numbers. Round to the nearest tenth. - $28,520,24,425,21,565,27,525,22,555$

Find the standard deviation for the given data. -To get the best deal on a CD player, Tom called eight appliance stores and asked the cost of a specific model. The prices he was quoted are listed below: $128 $186 $232 $353 $197 $329 $327 $174 Round results to the nearest ten cents.

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent. -Between 14.3 and 16.1 seconds

Find the mean -Six college buddies bought each other Christmas gifts. They spent $\$ 120.62, \$ 197.76, \$ 120.32$ , $\$ 160.53, \$ 147.36$ , and $\$ 120.34$ . Find the mean amount spent for Christmas gifts.

At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent. -Between 17 and 17.9 seconds

Obtain the five number summary for the given data. -The weekly salaries (in dollars) of sixteen government workers are listed below. 690 611 813 654 728 576 492 624 530 678 685 460 558 787 513 826

Find the standard deviation of the data summarized in the given frequency table. -The test scores of 40 students are summarized in the frequency table below. Find the standard deviation.

Find the mean for the list of numbers. Round to the nearest tenth. - $17,11,4,9,6,1,6$

Construct a boxplot. -The weights (in pounds) of 30 newborn babies are listed below. Construct a boxplot for the data set. 5.5 5.7 5.8 5.9 6.1 6.1 6.3 6.4 6.5 6.6 6.7 6.7 6.7 6.9 7.0 7.0 7.0 7.1 7.2 7.2 7.4 7.5 7.7 7.7 7.8 8.0 8.1 8.1 8.3 8.7

Construct a boxplot. -The test scores of 32 students are listed below. Construct a boxplot for the data set. 32 37 41 44 46 48 53 55 57 57 59 63 65 66 68 69 70 71 74 74 75 77 78 79 81 82 83 86 89 92 95 99

Find the standard deviation. Round to the nearest tenth. - $202,253,223,235,202,239,264,150,147$

Find the mean -The weight gains (in pounds) over a one month period of 10 patients on a special diet were: 7.7, $-6,2.3,6.5,4.4,-1,6.0,-6,5.3,4.9$ . Find the mean. Round your answer to the nearest hundredth.

Solve the problem. -If the life, in years, of a television set is normally distributed with a mean of 30 years and a standard deviation of 5 years, what should be the guarantee period if the company wants less than $3 \%$ of the television sets to fail while under warranty?

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Exam 10: Introduction to Statistics

Find the range for the set of data numbers. - 26,38,15,50,5126,38,15,50,5126,38,15,50,51