Question 1

Data summarized in a frequency distribution or histogram form are often called weighted data.

Accepted Answer

A) True 
 B)False

Question 2

Chebyshev's Theorem is only of practical use when analyzing a non-mound-shaped population that is not very skewed.

Accepted Answer

A) True 
 B)False

Question 3

An initial investment of $10,000 has a value of $7,382 at the end of year 1,a rate of return of 62.43 percent for year 2,and a geometric mean return at the end of year 3 of 0.512.Determine the rate of return for the third year.

Accepted Answer

The answer of An initial investment of $10,000 has a...

Question 4

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.She took a random sample of the price of 10 computers,with the following results. $3,250,$1,127,$2,995,$3,250,$3,445,$3,449,$1,482,$6,120,$3,009,$4,000
What is the 10th percentile?

Accepted Answer

A) $1,304.50 
B) $2,617.00 
C) $3,415.75 
D) $3,587.00 
E) $4,212.00 
A) $1,304.50 
B) $2,617.00 
C) $3,415.75 
D) $3,587.00 
E) $4,212.00

Question 5

The local amusement park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p.m. ).They selected 13 patrons and had them get in line between 2 and 3 p.m.Each was given a stopwatch to record the time they spent in line.The times recorded were as follows (in minutes). 118,124,108,116,99,120,148,118,119,121,45,130,118
What is the 10th percentile?

Accepted Answer

A) 99 
B) 120 
C) 130 
D) 112 
E) 45 
A) 99 
B) 120 
C) 130 
D) 112 
E) 45

Question 6

If the mean,median,and mode for a given population all equal 25,then we know that the shape of the distribution of the population is ____________.

Accepted Answer

A) Bimodal 
B) Skewed to the right 
C) Symmetrical 
D) Skewed to the left 
A) Bimodal 
B) Skewed to the right 
C) Symmetrical 
D) Skewed to the left

Question 7

The local amusement park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p.m. ).They selected 13 patrons and had them get in line between 2 and 3 p.m.Each was given a stopwatch to record the time they spent in line.The times recorded were as follows (in minutes). 118,124,108,116,99,120,148,118,119,121,45,130,118
What is the first quartile?

Accepted Answer

A) 100.8 
B) 118 
C) 130 
D) 116 
E) 45 
A) 100.8 
B) 118 
C) 130 
D) 116 
E) 45

Question 8

Another name for the 50th percentile is the ___________.

Accepted Answer

A) Mean 
B) First quartile 
C) Median 
D) Mode 
E) Third quartile 
A) Mean 
B) First quartile 
C) Median 
D) Mode 
E) Third quartile

Question 9

The local amusement park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p.m. ).They selected 13 patrons and had them get in line between 2 and 3 p.m.Each was given a stopwatch to record the time they spent in line.The times recorded were as follows (in minutes). 118,124,108,116,99,120,148,118,119,121,45,130,118
What is the 90th percentile?

Accepted Answer

A) 100.8 
B) 118 
C) 130 
D) 112 
E) 45 
A) 100.8 
B) 118 
C) 130 
D) 112 
E) 45

Question 10

In a statistics class,10 scores were randomly selected,with the following results: 74,73,77,77,71,68,65,77,67,66
What is the 90th percentile?

Accepted Answer

A) 77 
B) 73 
C) 74 
D) 67 
E) 65.9 
A) 77 
B) 73 
C) 74 
D) 67 
E) 65.9

Question 11

The local amusement park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p.m. ).They selected 13 patrons and had them get in line between 2 and 3 p.m.Each was given a stopwatch to record the time they spent in line.The times recorded were as follows (in minutes): 118,124,108,116,99,120,148,118,119,121,45,130,118. What is the mean?

Accepted Answer

A) 114.15 
B) 118 
C) 148 
D) 45 
E) 115.5 
A) 114.15 
B) 118 
C) 148 
D) 45 
E) 115.5

Question 12

In a statistics class,10 scores were randomly selected with the following results: 74,73,77,77,71,68,65,77,67,66
What are the lower and upper limits?

Accepted Answer

A) 67,77 
B) 57,87 
C) 37,107 
D) 52,92 
E) 47,97 
A) 67,77 
B) 57,87 
C) 37,107 
D) 52,92 
E) 47,97

Question 13

According to Chebyshev's Theorem,a range of how many standard deviations would include at least 80 percent of the values?

Accepted Answer

A) 5.0 
B) 2.2 
C) 2.5 
D) 1.6 
E) 2.0 
A) 5.0 
B) 2.2 
C) 2.5 
D) 1.6 
E) 2.0

Question 14

In a hearing test,subjects estimate the loudness (in decibels)of a sound,and the results are: 68,67,70,71,68,75,68,62,80,73,68. What is the mean?

Accepted Answer

A) 70 
B) 75 
C) 68 
D) 71 
E) 80 
A) 70 
B) 75 
C) 68 
D) 71 
E) 80

Question 15

The geometric mean growth rate of sales for used cars in a geographic area from 2005 to 2009 was 16.42 percent.Annual sales in 2005 were $14.2 million.Find the ending value of sales after this four-year period.

Accepted Answer

The answer of The geometric mean growth rate of sales...

Question 16

The local amusement park was interested in the average wait time at their most popular roller coaster at the peak park time (2 p.m. ).They selected 13 patrons and had them get in line between 2 and 3 p.m.Each was given a stopwatch to record the time they spent in line.The times recorded were as follows (in minutes). 118,124,108,116,99,120,148,118,119,121,45,130,118
What are the lower and upper limits?

Accepted Answer

A) 108.5,128.5 
B) 80.5,154.00 
C) 127.75,138.25 
D) 143.50,154.00 
E) 15.75,31.50 
A) 108.5,128.5 
B) 80.5,154.00 
C) 127.75,138.25 
D) 143.50,154.00 
E) 15.75,31.50

Question 17

Quality control is an important issue at ACME Company,which manufactures light bulbs.To test the life-hours of their light bulbs,they randomly sampled nine light bulbs and measured how many hours they lasted (mean = 346.6). 378,361,350,375,200,391,375,368,321
What is the range?

Accepted Answer

A) 342.43 
B) 3424.3 
C) 58.5 
D) 191 
E) 10,609 
A) 342.43 
B) 3424.3 
C) 58.5 
D) 191 
E) 10,609

Question 18

A correlation coefficient close to -1 says x and y are highly related.

Accepted Answer

A) True 
 B)False

Question 19

From the following table of values and corresponding sample sizes,calculate the weighted mean.

Accepted Answer

The answer of From the following table of values and...

Question 20

In a statistics class,10 scores were randomly selected with the following results (mean = 71.5): 74,73,77,77,71,68,65,77,67,66
What is the range?

Accepted Answer

A) 22.72 
B) 12.00 
C) 4.77 
D) 516.20 
E) 144.00 
A) 22.72 
B) 12.00 
C) 4.77 
D) 516.20 
E) 144.00

Data summarized in a frequency distribution or histogram form are often called weighted data.

Chebyshev's Theorem is only of practical use when analyzing a non-mound-shaped population that is not very skewed.

An initial investment of $10,000 has a value of $7,382 at the end of year 1,a rate of return of 62.43 percent for year 2,and a geometric mean return at the end of year 3 of 0.512.Determine the rate of return for the third year.

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.She took a random sample of the price of 10 computers,with the following results. $3,250,$1,127,$2,995,$3,250,$3,445,$3,449,$1,482,$6,120,$3,009,$4,000 What is the 10^th percentile?

If the mean,median,and mode for a given population all equal 25,then we know that the shape of the distribution of the population is ____________.

Another name for the 50^th percentile is the ___________.

In a statistics class,10 scores were randomly selected,with the following results: 74,73,77,77,71,68,65,77,67,66 What is the 90^th percentile?

In a statistics class,10 scores were randomly selected with the following results: 74,73,77,77,71,68,65,77,67,66 What are the lower and upper limits?

According to Chebyshev's Theorem,a range of how many standard deviations would include at least 80 percent of the values?

In a hearing test,subjects estimate the loudness (in decibels)of a sound,and the results are: 68,67,70,71,68,75,68,62,80,73,68. What is the mean?

The geometric mean growth rate of sales for used cars in a geographic area from 2005 to 2009 was 16.42 percent.Annual sales in 2005 were $14.2 million.Find the ending value of sales after this four-year period.

Quality control is an important issue at ACME Company,which manufactures light bulbs.To test the life-hours of their light bulbs,they randomly sampled nine light bulbs and measured how many hours they lasted (mean = 346.6). 378,361,350,375,200,391,375,368,321 What is the range?

A correlation coefficient close to -1 says x and y are highly related.

From the following table of values and corresponding sample sizes,calculate the weighted mean.

In a statistics class,10 scores were randomly selected with the following results (mean = 71.5): 74,73,77,77,71,68,65,77,67,66 What is the range?

An Introduction to Business Statistics

Descriptive Statistics: Tabular and Graphical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Process Improvement Using Control Charts

Filters

Exam 3: Descriptive Statistics: Numerical Methods

Data summarized in a frequency distribution or histogram form are often called weighted data.

Chebyshev's Theorem is only of practical use when analyzing a non-mound-shaped population that is not very skewed.

An initial investment of $10,000 has a value of $7,382 at the end of year 1,a rate of return of 62.43 percent for year 2,and a geometric mean return at the end of year 3 of 0.512.Determine the rate of return for the third year.

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.She took a random sample of the price of 10 computers,with the following results. $3,250,$1,127,$2,995,$3,250,$3,445,$3,449,$1,482,$6,120,$3,009,$4,000 What is the 10th percentile?

If the mean,median,and mode for a given population all equal 25,then we know that the shape of the distribution of the population is ____________.

Another name for the 50th percentile is the ___________.

In a statistics class,10 scores were randomly selected,with the following results: 74,73,77,77,71,68,65,77,67,66 What is the 90th percentile?

In a statistics class,10 scores were randomly selected with the following results: 74,73,77,77,71,68,65,77,67,66 What are the lower and upper limits?

According to Chebyshev's Theorem,a range of how many standard deviations would include at least 80 percent of the values?

In a hearing test,subjects estimate the loudness (in decibels)of a sound,and the results are: 68,67,70,71,68,75,68,62,80,73,68. What is the mean?

The geometric mean growth rate of sales for used cars in a geographic area from 2005 to 2009 was 16.42 percent.Annual sales in 2005 were $14.2 million.Find the ending value of sales after this four-year period.

Quality control is an important issue at ACME Company,which manufactures light bulbs.To test the life-hours of their light bulbs,they randomly sampled nine light bulbs and measured how many hours they lasted (mean = 346.6). 378,361,350,375,200,391,375,368,321 What is the range?

A correlation coefficient close to -1 says x and y are highly related.

From the following table of values and corresponding sample sizes,calculate the weighted mean.

In a statistics class,10 scores were randomly selected with the following results (mean = 71.5): 74,73,77,77,71,68,65,77,67,66 What is the range?

An Introduction to Business Statistics

Descriptive Statistics: Tabular and Graphical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Process Improvement Using Control Charts

Filters

Another name for the 50^th percentile is the ___________.

In a statistics class,10 scores were randomly selected,with the following results: 74,73,77,77,71,68,65,77,67,66 What is the 90^th percentile?