Question 1

Describe the shape of the given histogram.
-

Accepted Answer

A)  Right skewed 
B)  Normal 
C)  Uniform 
D)  Left skewed 
A)  Right skewed 
B)  Normal 
C)  Uniform 
D)  Left skewed

Question 2

Find the mean
-The normal monthly precipitation (in inches) for August is listed for 20 different U.S. cities. Find the mean of the data. Round to the nearest hundredth.
$\begin{array}{llllll}3.5 & 1.6 & 2.4 & 3.7 & 4.1\end{array}$
$\begin{array}{llllll}3.9 & 1.0 & 3.6 & 4.2 & 3.4\end{array}$
$\begin{array}{lllll}3.7 & 2.2 & 1.5 & 4.2 & 3.4\end{array}$
$\begin{array}{lllll}2.7 & 0.4 & 3.7 & 2.0 & 3.6\end{array}$

Accepted Answer

A)  3.27 in. 
B)  $3.09 \mathrm{in}$. 
C)  2.80 in. 
D)  2.94 in. 
A)  3.27 in. 
B)  $3.09 \mathrm{in}$. 
C)  2.80 in. 
D)  2.94 in.

Question 3

A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, anddistribution approximated by a normal curve. Find the approximate number of bulbs that can be expected to last thespecified period of time.
-Less than 200 hours

Accepted Answer

A)  10 
B)  5 
C)  2494 
D)  7 
A)  10 
B)  5 
C)  2494 
D)  7

Question 4

Solve the problem.
-Use the boxplot below from data for state and local community expenditures on hospitals and highways. Is there greater variability in hospital spending or highway spending?

Accepted Answer

A)  Hospital 
B)  Highway 
A)  Hospital 
B)  Highway

Question 5

Find the mean for the list of numbers. Round to the nearest tenth.
-$34,27,82,13,133,72$

Accepted Answer

A)  60.2 
B)  72.2 
C)  59.7 
D)  60.7 
A)  60.2 
B)  72.2 
C)  59.7 
D)  60.7

Question 6

Find the mode or modes.
-$97,68,32,68,29,97$

Accepted Answer

A)  68 
B)  65.2 
C)  97,68 
D)  97 
A)  68 
B)  65.2 
C)  97,68 
D)  97

Question 7

Find the median.
-$3,6,14,21,32,37,48$

Accepted Answer

A)  23 
B)  14 
C)  32 
D)  21 
A)  23 
B)  14 
C)  32 
D)  21

Question 8

Find the standard deviation for the given data.
-The manager of an electrical supply store measured the diameters of the rolls of wire in the inventory. The diameters of the rolls (in $\mathrm{m}$ ) are listed below. Round results to four decimal places. $\begin{array}{llllllll}0.458 & 0.5 & 0.632 & 0.336 & 0.4 & 0.556 & 0.43\end{array}$

Accepted Answer

A)  0.0992 
B)  0.336 
C)  1.5670 
D)  1.6261 
A)  0.0992 
B)  0.336 
C)  1.5670 
D)  1.6261

Question 9

Find the standard deviation for the given data.
-The normal monthly precipitation (in inches) for August is listed for 12 different U.S. cities.
$\begin{array}{lllllll}3.5 & 1.6 & 2.4 & 3.7 & 4.1 & 3.9\end{array}$
$\begin{array}{lllllll}1.0 & 3.6 & 4.2 & 3.4 & 3.7 & 2.2\end{array}$
Round results to two decimal places.

Accepted Answer

A)  12.03 
B)  1.09 
C)  1.00 
D)  1.05 
A)  12.03 
B)  1.09 
C)  1.00 
D)  1.05

Question 10

A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, anddistribution approximated by a normal curve. Find the approximate number of bulbs that can be expected to last thespecified period of time.
-Between 540 hours and 780 hours

Accepted Answer

A)  1717 
B)  2217 
C)  2215 
D)  1710 
A)  1717 
B)  2217 
C)  2215 
D)  1710

Question 11

Obtain the five number summary for the given data.
-The normal annual precipitation (in inches) is given below for 21 different U.S. cities.

Accepted Answer

A)  $5.1,14.5,22.8,30.0,51.7$ inches 
B)  $5.1,14.45,21.75,32.20,51.7$ inches 
C)  $5.1,14.425,21.75,29.450,51.7$ inches 
D)  $5.1,14.425,22.8,29.450,51.7$ inches 
A)  $5.1,14.5,22.8,30.0,51.7$ inches 
B)  $5.1,14.45,21.75,32.20,51.7$ inches 
C)  $5.1,14.425,21.75,29.450,51.7$ inches 
D)  $5.1,14.425,22.8,29.450,51.7$ inches

Question 12

Construct a-stem and leaf display for the given data table.
-$\begin{array}{llllllllll}40 & 21 & 82 & 88 & 50 \end{array}$
$\begin{array}{llllllllll}22 & 62 & 79 & 45 & 77 \end{array}$
$\begin{array}{llllllllll}35 & 16 & 24 & 82 & 57 \end{array}$
$\begin{array}{llllllllll}68 & 57 & 64 & 35 & 16 \end{array}$
$\begin{array}{llllllllll}18 & 29 & 75 & 72 & 45 \end{array}$

Accepted Answer

The answer of Construct a-stem and leaf display for the...

Question 13

Find the mean
-The Wellspring Company's fleet of trucks get 20, 9, 19, 8, 16, 9, and 24 miles per gallon. Round to the nearest whole number.

Accepted Answer

A)  14 miles per gallon 
B)  16 miles per gallon 
C)  18 miles per gallon 
D)  15 miles per gallon 
A)  14 miles per gallon 
B)  16 miles per gallon 
C)  18 miles per gallon 
D)  15 miles per gallon

Question 14

Find the median.
-$19,26,38,46,61,67,86$

Accepted Answer

A)  61 
B)  46 
C)  38 
D)  49 
A)  61 
B)  46 
C)  38 
D)  49

Question 15

Construct a boxplot.
-The weekly salaries (in dollars) of 24 randomly selected employees of a company are shown below. Construct a boxplot for the data set.
$\begin{array}{lllllllllll}310 & 320 & 450 & 460 & 470 & 500 & 520 & 540\end{array}$
$\begin{array}{lllllllllll}580 & 600 & 650 & 700 & 710 & 840 & 870 & 900 \end{array}$
$\begin{array}{lllllllllll}1000 & 1200 & 1250 & 1300 & 1400 & 1720 & 2500 & 3700 \end{array}$

Accepted Answer

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

Question 16

Find the mode or modes.
-$7.08,7.41,7.56,7.08,7.88,7.99,7.62$

Accepted Answer

A)  7.08 
B)  7.41 
C)  7.56 
D)  7.517 
A)  7.08 
B)  7.41 
C)  7.56 
D)  7.517

Question 17

Construct a frequency polygon.
-

Accepted Answer

A)    
B)    
A)    
B)

Question 18

Find the mean
-Frank's Furniture employees earned $\$ 246.43, \$ 204.29, \$ 536.61, \$ 476.73, \$ 191.36$, and $\$ 520.74$ for last week. Find the mean wage.

Accepted Answer

A)  $\$ 544.04$ 
B)  $\$ 435.23$ 
C)  $\$ 423.23$ 
D)  $\$ 362.69$ 
A)  $\$ 544.04$ 
B)  $\$ 435.23$ 
C)  $\$ 423.23$ 
D)  $\$ 362.69$

Question 19

Solve the problem.
-If the life, in months, of a certain type of car battery is normally distributed with a mean of 76 months and a standard deviation of 10 months, what should be the guarantee period if the company wants less than $5 \%$ of the batteries to fail while under warranty?

Accepted Answer

A)  Less than 50.2 months 
B)  Less than 12.54 months 
C)  Less than 92.5 months 
D)  Less than 59.5 months 
A)  Less than 50.2 months 
B)  Less than 12.54 months 
C)  Less than 92.5 months 
D)  Less than 59.5 months

Question 20

Find the range for the set of data numbers.
-$5,20,1,13,10$

Accepted Answer

A)  5 
B)  20 
C)  1 
D)  19 
A)  5 
B)  20 
C)  1 
D)  19

Describe the shape of the given histogram. -

Find the mean -The normal monthly precipitation (in inches) for August is listed for 20 different U.S. cities. Find the mean of the data. Round to the nearest hundredth. 3.5 1.6 2.4 3.7 4.1 3.9 1.0 3.6 4.2 3.4 3.7 2.2 1.5 4.2 3.4 2.7 0.4 3.7 2.0 3.6

A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, anddistribution approximated by a normal curve. Find the approximate number of bulbs that can be expected to last thespecified period of time. -Less than 200 hours

Solve the problem. -Use the boxplot below from data for state and local community expenditures on hospitals and highways. Is there greater variability in hospital spending or highway spending?

Find the mean for the list of numbers. Round to the nearest tenth. - $34,27,82,13,133,72$

Find the mode or modes. - $97,68,32,68,29,97$

Find the median. - $3,6,14,21,32,37,48$

Find the standard deviation for the given data. -The manager of an electrical supply store measured the diameters of the rolls of wire in the inventory. The diameters of the rolls (in $\mathrm{m}$ ) are listed below. Round results to four decimal places. 0.458 0.5 0.632 0.336 0.4 0.556 0.43

Find the standard deviation for the given data. -The normal monthly precipitation (in inches) for August is listed for 12 different U.S. cities. 3.5 1.6 2.4 3.7 4.1 3.9 1.0 3.6 4.2 3.4 3.7 2.2 Round results to two decimal places.

A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, anddistribution approximated by a normal curve. Find the approximate number of bulbs that can be expected to last thespecified period of time. -Between 540 hours and 780 hours

Obtain the five number summary for the given data. -The normal annual precipitation (in inches) is given below for 21 different U.S. cities.

Construct a-stem and leaf display for the given data table. - 40 21 82 88 50 22 62 79 45 77 35 16 24 82 57 68 57 64 35 16 18 29 75 72 45

Find the mean -The Wellspring Company's fleet of trucks get 20, 9, 19, 8, 16, 9, and 24 miles per gallon. Round to the nearest whole number.

Find the median. - $19,26,38,46,61,67,86$

Construct a boxplot. -The weekly salaries (in dollars) of 24 randomly selected employees of a company are shown below. Construct a boxplot for the data set. 310 320 450 460 470 500 520 540 580 600 650 700 710 840 870 900 1000 1200 1250 1300 1400 1720 2500 3700

Find the mode or modes. - $7.08,7.41,7.56,7.08,7.88,7.99,7.62$

Construct a frequency polygon. -

Find the mean -Frank's Furniture employees earned $\$ 246.43, \$ 204.29, \$ 536.61, \$ 476.73, \$ 191.36$ , and $\$ 520.74$ for last week. Find the mean wage.

Solve the problem. -If the life, in months, of a certain type of car battery is normally distributed with a mean of 76 months and a standard deviation of 10 months, what should be the guarantee period if the company wants less than $5 \%$ of the batteries to fail while under warranty?

Find the range for the set of data numbers. - $5,20,1,13,10$

Algebra and Equations

Graphs, Lines, and Inequalities

Functions and Graphs

Exponential and Logarithmic Functions

Mathematics of Finance

Systems of Linear Equations and Matrices

Linear Programming

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Counting, Probability Distributions, and Further Topics in Probability

Differential Calculus

Applications of the Derivative

Integral Calculus

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Exam 10: Introduction to Statistics