Question 1

Construct a-stem and leaf display for the given data table.
-$\begin{array}{llllllllll}34 & 12 & 62 & 14 & 63 & 26 \end{array}$
$\begin{array}{llllllllll}44 & 21 & 34 & 28 & 44 & 17 \end{array}$
$\begin{array}{llllllllll}33 & 19 & 67 & 69 & 56 & 13 \end{array}$

Accepted Answer

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

Question 2

Find the mean for the list of numbers. Round to the nearest tenth.
-$17,4,30,17$

Accepted Answer

A) 2 4 
B)  17.5 
C)  17 
D)  15.5 
A) 2 4 
B)  17.5 
C)  17 
D)  15.5

Question 3

Solve the problem. Round to the nearest hundredth.
-Using the employment information in the table on Alpha Corporation, find the mean for the grouped data.

Accepted Answer

A)  12.93 
B)  13.57 
C)  15.50 
D)  10.83 
A)  12.93 
B)  13.57 
C)  15.50 
D)  10.83

Question 4

Find the median.
-$35,40,34,36,33,35,39,38,31,34,36,37$

Accepted Answer

A)  214.0 
B)  428 
C)  35.5 
D)  None of these 
A)  214.0 
B)  428 
C)  35.5 
D)  None of these

Question 5

Find a $z$ score satisfying the given condition.
-$4 \%$ of the total area is to the left of $z$.

Accepted Answer

A) 1 .70 
B)  1.74 
C)  -1.76 
D)  -1.75 
A) 1 .70 
B)  1.74 
C)  -1.76 
D)  -1.75

Question 6

Prepare a frequency distribution for the given data with columns for intervals and frequencies.
-A medical research team studied the ages of patients who had strokes caused by stress. The ages of 34 patients who suffered stress strokes were as follows. Use 8 intervals starting with 25-29.
29 30 36 41 45 50 57 61 28 50 36 58
60 38 36 47 40 32 58 46 61 40 55 32
61 56 45 46 62 36 38 40 50 27

Accepted Answer

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

Question 7

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.
-At least 500 hours

Accepted Answer

A)  5000 
B)  2500 
C)  1000 
D)  2400 
A)  5000 
B)  2500 
C)  1000 
D)  2400

Question 8

Find the standard deviation of the data summarized in the given frequency table.
-The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency table below summarizes the results. Find the standard deviation. Round your answer to one decimal place.

Accepted Answer

A)  4.7 
B)  5.4 
C)  5.2 
D)  5.0 
A)  4.7 
B)  5.4 
C)  5.2 
D)  5.0

Question 9

Find the median.
-$2,13,25,29,33,37$

Accepted Answer

A)  25 
B)  23.5 
C)  29 
D)  27 
A)  25 
B)  23.5 
C)  29 
D)  27

Question 10

Describe the shape of the given histogram.
-

Accepted Answer

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

Question 11

Find the mode or modes.
-$95,25,95,13,25,29,56,95$

Accepted Answer

A)  54.1 
B)  25 
C)  42.5 
D)  95 
A)  54.1 
B)  25 
C)  42.5 
D)  95

Question 12

Describe the shape of the given histogram.
-

Accepted Answer

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

Question 13

Assume the distribution is normal. Use the area of the normal curve to answer the question. Round to the nearest whole percent.
-The average weekly income of teachers in one state is $\$ 390$ with a standard deviation of $\$ 45$. What is the probability of a teacher earning more than $\$ 425$ a week?

Accepted Answer

A)  $26 \%$ 
B)  $21 \%$ 
C)  $22 \%$ 
D)  $25 \%$ 
A)  $26 \%$ 
B)  $21 \%$ 
C)  $22 \%$ 
D)  $25 \%$

Question 14

Solve the problem.
-Find the percent of the area under the standard normal curve between $\mathrm{z}=1.41$ and $\mathrm{z}=2.83$.

Accepted Answer

A) 7 . $85 \%$ 
B)  $7.8 \%$ 
C)  $7.9 \%$ 
D)  $7.7 \%$ 
A) 7 . $85 \%$ 
B)  $7.8 \%$ 
C)  $7.9 \%$ 
D)  $7.7 \%$

Question 15

Find a $z$ score satisfying the given condition.
-$3.0 \%$ of the total area is to the right of $z$.

Accepted Answer

A)  -1.89 
B)  -1.88 
C)  1.88 
D)  1.89 
A)  -1.89 
B)  -1.88 
C)  1.88 
D)  1.89

Question 16

Find the mean for the frequency distribution. Round to the nearest tenth.
-

Accepted Answer

A)  22.6 
B)  24.9 
C)  23.3 
D)  5.4 
A)  22.6 
B)  24.9 
C)  23.3 
D)  5.4

Question 17

Assume the distribution is normal. Use the area of the normal curve to answer the question. Round to the nearest whole percent.
-A machine fills quart soda bottles with an average of $32.3 \mathrm{oz}$ per bottle, with a standard deviation of $1.2 \mathrm{oz}$. What is the probability that a filled bottle will contain less than $32 \mathrm{oz}$ ?

Accepted Answer

A)  $38 \%$ 
B)  $60 \%$ 
C)  $40 \%$ 
D)  $41 \%$ 
A)  $38 \%$ 
B)  $60 \%$ 
C)  $40 \%$ 
D)  $41 \%$

Question 18

Solve the problem.
-The life span of a certain type of car timing belt, calculated in miles, is normally distributed, with a mean of 80,000 miles and a standard deviation of 6500 miles. If the maker of the timing belt wants less than $4 \%$ of the belts to fail while under warranty, for how many miles should the timing belts be guaranteed?

Accepted Answer

A)  Less than 90,725 miles 
B)  Less than 97,225 miles 
C)  Less than 62,775 miles 
D)  Less than 68,625 miles 
A)  Less than 90,725 miles 
B)  Less than 97,225 miles 
C)  Less than 62,775 miles 
D)  Less than 68,625 miles

Question 19

Construct the specified histogram.
-The frequency table below shows the number of days off in a given year for 30 police detectives.
   
Construct a histogram.

Accepted Answer

The answer of Construct the specified histogram.
-The frequency table below...

Question 20

Find a $z$ score satisfying the given condition.
-$20.1 \%$ of the total area is to the right of $z$.

Accepted Answer

A)  -0.84 
B)  0.82 
C)  0.84 
D)  0.83 
A)  -0.84 
B)  0.82 
C)  0.84 
D)  0.83

Construct a-stem and leaf display for the given data table. - 34 12 62 14 63 26 44 21 34 28 44 17 33 19 67 69 56 13

Find the mean for the list of numbers. Round to the nearest tenth. - $17,4,30,17$

Solve the problem. Round to the nearest hundredth. -Using the employment information in the table on Alpha Corporation, find the mean for the grouped data.

Find the median. - $35,40,34,36,33,35,39,38,31,34,36,37$

Find a $z$ score satisfying the given condition. - $4 \%$ of the total area is to the left of $z$ .

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. -At least 500 hours

Find the median. - $2,13,25,29,33,37$

Describe the shape of the given histogram. -

Find the mode or modes. - $95,25,95,13,25,29,56,95$

Describe the shape of the given histogram. -

Solve the problem. -Find the percent of the area under the standard normal curve between $\mathrm{z}=1.41$ and $\mathrm{z}=2.83$ .

Find a $z$ score satisfying the given condition. - $3.0 \%$ of the total area is to the right of $z$ .

Find the mean for the frequency distribution. Round to the nearest tenth. -

Construct the specified histogram. -The frequency table below shows the number of days off in a given year for 30 police detectives. Construct a histogram.

Find a $z$ score satisfying the given condition. - $20.1 \%$ of the total area is to the right of $z$ .

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

Sets and Probability

Counting, Probability Distributions, and Further Topics in Probability

Differential Calculus

Applications of the Derivative

Integral Calculus

Multivariate Calculus

Filters

Exam 10: Introduction to Statistics

Construct a-stem and leaf display for the given data table. - 34 12 62 14 63 26 44 21 34 28 44 17 33 19 67 69 56 13

Find the mean for the list of numbers. Round to the nearest tenth. - 17,4,30,1717,4,30,1717,4,30,17

Solve the problem. Round to the nearest hundredth. -Using the employment information in the table on Alpha Corporation, find the mean for the grouped data.

Find the median. - 35,40,34,36,33,35,39,38,31,34,36,3735,40,34,36,33,35,39,38,31,34,36,3735,40,34,36,33,35,39,38,31,34,36,37

Find a zzz score satisfying the given condition. - 4%4 \%4% of the total area is to the left of zzz .

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. -At least 500 hours

Find the median. - 2,13,25,29,33,372,13,25,29,33,372,13,25,29,33,37

Describe the shape of the given histogram. -

Find the mode or modes. - 95,25,95,13,25,29,56,9595,25,95,13,25,29,56,9595,25,95,13,25,29,56,95

Describe the shape of the given histogram. -

Solve the problem. -Find the percent of the area under the standard normal curve between z=1.41\mathrm{z}=1.41z=1.41 and z=2.83\mathrm{z}=2.83z=2.83 .

Find a zzz score satisfying the given condition. - 3.0%3.0 \%3.0% of the total area is to the right of zzz .

Find the mean for the frequency distribution. Round to the nearest tenth. -

Construct the specified histogram. -The frequency table below shows the number of days off in a given year for 30 police detectives. Construct a histogram.

Find a zzz score satisfying the given condition. - 20.1%20.1 \%20.1% of the total area is to the right of zzz .

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

Sets and Probability

Counting, Probability Distributions, and Further Topics in Probability

Differential Calculus

Applications of the Derivative

Integral Calculus

Multivariate Calculus

Filters

Find the mean for the list of numbers. Round to the nearest tenth. - $17,4,30,17$

Find the median. - $35,40,34,36,33,35,39,38,31,34,36,37$

Find a $z$ score satisfying the given condition. - $4 \%$ of the total area is to the left of $z$ .

Find the median. - $2,13,25,29,33,37$

Find the mode or modes. - $95,25,95,13,25,29,56,95$

Solve the problem. -Find the percent of the area under the standard normal curve between $\mathrm{z}=1.41$ and $\mathrm{z}=2.83$ .

Find a $z$ score satisfying the given condition. - $3.0 \%$ of the total area is to the right of $z$ .

Find a $z$ score satisfying the given condition. - $20.1 \%$ of the total area is to the right of $z$ .