Question 1

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 2

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.A random sample of the price of 10 computers was taken with the following results (mean = $3,213): $3,250,$1,127,$2,995,$3,250,$3,445,$3,449,$1,482,$6,120,$3,009,$4,000 What is the range?

Accepted Answer

A) 1359 
B) 4993 
C) 1846575 
D) 3587 
E) 1976454 
A) 1359 
B) 4993 
C) 1846575 
D) 3587 
E) 1976454

Question 3

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.A random sample of the price of 10 computers was taken 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 first quartile?

Accepted Answer

A) $1,446.5 
B) $2,617 
C) $3,415.75 
D) $3,587 
E) $4,212 
A) $1,446.5 
B) $2,617 
C) $3,415.75 
D) $3,587 
E) $4,212

Question 4

When using the Chebyshev's theorem to obtain the bounds for a 99.73 percent of the values in a population,the interval generally will be ___________ the interval obtained for the same percentage if normal distribution is assumed (empirical rule).

Accepted Answer

A) Shorter than 
B) Wider than 
C) The same as 
A) Shorter than 
B) Wider than 
C) The same as

Question 5

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

Accepted Answer

A) 60.5,80.5 
B) 75.5,80.5 
C) 53,88 
D) 83,88 
E) 7.5,15 
A) 60.5,80.5 
B) 75.5,80.5 
C) 53,88 
D) 83,88 
E) 7.5,15

Question 6

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.A random sample of the price of 10 computers was taken 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 mean?

Accepted Answer

A) 3447 
B) 3213 
C) 3250 
D) 6120 
E) 3445 
A) 3447 
B) 3213 
C) 3250 
D) 6120 
E) 3445

Question 7

According to Chebyshev's Theorem,at least what proportion of the data will be within   for: k = 2

Accepted Answer

A) 68% 
B) 50% 
C) 25% 
D) 75% 
E) 34% 
A) 68% 
B) 50% 
C) 25% 
D) 75% 
E) 34%

Question 8

A numeric characteristic of a sample is a

Accepted Answer

A) Mean 
B) Variance 
C) Statistic 
D) Parameter 
A) Mean 
B) Variance 
C) Statistic 
D) Parameter

Question 9

Personnel managers usually want to know where a job applicant ranked in his or her graduating class.With the grade point average of 3.83,Michelle Robinson graduated above the 93rd percentile of her graduating class.What is the percentile rank of a student whose GPA was the median GPA.

Accepted Answer

A) 25th 
B) 50th 
C) 75th 
D) 10th 
E) 93rd 
A) 25th 
B) 50th 
C) 75th 
D) 10th 
E) 93rd

Question 10

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 stop watch 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 inner fences?

Accepted Answer

A) 96.25,138.25 
B) 80.5,154.00 
C) 127.75,138.25 
D) 143.50,154.00 
E) 15.75,31.50 
A) 96.25,138.25 
B) 80.5,154.00 
C) 127.75,138.25 
D) 143.50,154.00 
E) 15.75,31.50

Question 11

According to a survey of the top 10 employers in a major city in the Midwest,a worker spends an average of 413 minutes a day on the job.Suppose the standard deviation is 26.8 minutes and the time spent is approximately a normal distribution. What are the times that approximately 95.44% of all workers will fall?

Accepted Answer

A) [387.5 438.5] 
B) [386.2 439.8] 
C) [372.8 453.2] 
D) [359.4 466.6] 
E) [332.6 493.4] 
A) [387.5 438.5] 
B) [386.2 439.8] 
C) [372.8 453.2] 
D) [359.4 466.6] 
E) [332.6 493.4]

Question 12

The median is said to be resistant to extreme values.

Accepted Answer

A) True 
 B)False

Question 13

The ____________________ is a quantity that measures the variation of a population or sample relative to its mean.

Accepted Answer

A) Mean 
B) Standard deviation 
C) Range 
D) Coefficient of variation 
E) Z-score 
A) Mean 
B) Standard deviation 
C) Range 
D) Coefficient of variation 
E) Z-score

Question 14

Using Chebyshev's Rule,find the interval that contains at least 93.75% of all measurements when mean = 2.549 and s = 1.828.

Accepted Answer

A) [-2.935 8.033] 
B) [-1.107 6.205] 
C) [-26.699 31.797] 
D) [2.435 2.663] 
E) [-4.763 9.861] 
A) [-2.935 8.033] 
B) [-1.107 6.205] 
C) [-26.699 31.797] 
D) [2.435 2.663] 
E) [-4.763 9.861]

Question 15

A disadvantage of using grouping (a frequency table)with sample data is that:

Accepted Answer

A) Calculations involving central tendency and variation are more complicated than central tendency and variation calculations based on ungrouped data. 
B) The descriptive statistics are less precise than the descriptive statistics obtained using ungrouped data. 
C) The interpretation of the grouped data descriptive statistics is meaningless. 
D) It is much more difficult to summarize the information than it is with the ungrouped data. 
A) Calculations involving central tendency and variation are more complicated than central tendency and variation calculations based on ungrouped data. 
B) The descriptive statistics are less precise than the descriptive statistics obtained using ungrouped data. 
C) The interpretation of the grouped data descriptive statistics is meaningless. 
D) It is much more difficult to summarize the information than it is with the ungrouped data.

Question 16

Quality control is an important issue at ACME Company which manufactures light bulbs.In order to conduct testing of the life hours of their light bulbs,they randomly sampled nine light bulbs and measured how many hours they lasted.378,361,350,375,200,391,375,368,321 What is the median?

Accepted Answer

A) 375 
B) 368 
C) 389.9 
D) 200 
E) 346.6 
A) 375 
B) 368 
C) 389.9 
D) 200 
E) 346.6

Question 17

In a statistic class,10 scores were randomly selected with the following results were obtained: 74,73,77,77,71,68,65,77,67,66 What is the first quartile?

Accepted Answer

A) 65.9 
B) 67.3 
C) 66.75 
D) 73.85 
E) 77.0 
A) 65.9 
B) 67.3 
C) 66.75 
D) 73.85 
E) 77.0

Question 18

The following frequency table summarizes the ages of 60 shoppers at the local grocery store.   Calculate the approximate sample mean for this data (mean for the grouped data).

Accepted Answer

A) 37.50 years 
B) 36.25 years 
C) 32.25 years 
D) 40.25 years 
E) 45.50 years 
A) 37.50 years 
B) 36.25 years 
C) 32.25 years 
D) 40.25 years 
E) 45.50 years

Question 19

According to a survey of the top 10 employers in a major city in the Midwest,a worker spends an average of 413 minutes a day on the job.Suppose the standard deviation is 26.8 minutes and the time spent is approximately a normal distribution. What are the times that approximately 99.73% of all workers will fall?

Accepted Answer

A) [305.8 520.2] 
B) [386.2 439.8] 
C) [372.8 453.2] 
D) [359.4 466.6] 
E) [332.6 493.4] 
A) [305.8 520.2] 
B) [386.2 439.8] 
C) [372.8 453.2] 
D) [359.4 466.6] 
E) [332.6 493.4]

Question 20

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

Accepted Answer

A) 65.9 
B) 67.3 
C) 66.75 
D) 73.85 
E) 77.0 
A) 65.9 
B) 67.3 
C) 66.75 
D) 73.85 
E) 77.0

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

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.A random sample of the price of 10 computers was taken 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 first quartile?

When using the Chebyshev's theorem to obtain the bounds for a 99.73 percent of the values in a population,the interval generally will be ___________ the interval obtained for the same percentage if normal distribution is assumed (empirical rule).

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

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.A random sample of the price of 10 computers was taken 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 mean?

According to Chebyshev's Theorem,at least what proportion of the data will be within for: k = 2

A numeric characteristic of a sample is a

Personnel managers usually want to know where a job applicant ranked in his or her graduating class.With the grade point average of 3.83,Michelle Robinson graduated above the 93^rd percentile of her graduating class.What is the percentile rank of a student whose GPA was the median GPA.

The median is said to be resistant to extreme values.

The ____________________ is a quantity that measures the variation of a population or sample relative to its mean.

Using Chebyshev's Rule,find the interval that contains at least 93.75% of all measurements when mean = 2.549 and s = 1.828.

A disadvantage of using grouping (a frequency table)with sample data is that:

Quality control is an important issue at ACME Company which manufactures light bulbs.In order to conduct testing of the life hours of their light bulbs,they randomly sampled nine light bulbs and measured how many hours they lasted.378,361,350,375,200,391,375,368,321 What is the median?

In a statistic class,10 scores were randomly selected with the following results were obtained: 74,73,77,77,71,68,65,77,67,66 What is the first quartile?

The following frequency table summarizes the ages of 60 shoppers at the local grocery store. Calculate the approximate sample mean for this data (mean for the grouped data).

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

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

Model Building and Model Diagnostics

Time Series Forecasting

Process Improvement Using Control Charts

Nonparametric Methods

Decision Theory

Filters

Exam 3: Descriptive Statistics: Numerical Methods

Another name for the 50th percentile is the _____.

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.A random sample of the price of 10 computers was taken 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 first quartile?

When using the Chebyshev's theorem to obtain the bounds for a 99.73 percent of the values in a population,the interval generally will be ___________ the interval obtained for the same percentage if normal distribution is assumed (empirical rule).

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

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.A random sample of the price of 10 computers was taken 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 mean?

According to Chebyshev's Theorem,at least what proportion of the data will be within for: k = 2

A numeric characteristic of a sample is a

Personnel managers usually want to know where a job applicant ranked in his or her graduating class.With the grade point average of 3.83,Michelle Robinson graduated above the 93rd percentile of her graduating class.What is the percentile rank of a student whose GPA was the median GPA.

The median is said to be resistant to extreme values.

The ____________________ is a quantity that measures the variation of a population or sample relative to its mean.

Using Chebyshev's Rule,find the interval that contains at least 93.75% of all measurements when mean = 2.549 and s = 1.828.

A disadvantage of using grouping (a frequency table)with sample data is that:

Quality control is an important issue at ACME Company which manufactures light bulbs.In order to conduct testing of the life hours of their light bulbs,they randomly sampled nine light bulbs and measured how many hours they lasted.378,361,350,375,200,391,375,368,321 What is the median?

In a statistic class,10 scores were randomly selected with the following results were obtained: 74,73,77,77,71,68,65,77,67,66 What is the first quartile?

The following frequency table summarizes the ages of 60 shoppers at the local grocery store. Calculate the approximate sample mean for this data (mean for the grouped data).

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

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

Model Building and Model Diagnostics

Time Series Forecasting

Process Improvement Using Control Charts

Nonparametric Methods

Decision Theory

Filters

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

Personnel managers usually want to know where a job applicant ranked in his or her graduating class.With the grade point average of 3.83,Michelle Robinson graduated above the 93^rd percentile of her graduating class.What is the percentile rank of a student whose GPA was the median GPA.

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