Question 1

Outliers are indicated using fences on a

Accepted Answer

A) box plot. 
B) dot plot. 
C) histogram. 
D) Pareto chart. 
A) box plot. 
B) dot plot. 
C) histogram. 
D) Pareto chart.

Question 2

Six graduates from Fulsome University's Master's of Waste Management program were hired by a Saudi Arabian firm at $110,000 each,while the other four graduates were unemployed.The university placement office bragged,"Our MWM graduates enjoyed a median starting salary of $110,000." Is this a reasonable assessment of central tendency? What are the alternatives?

Accepted Answer

No,the median is not a reasonable measur

Question 3

Which is the Excel formula for the standard deviation of a sample array named Data?

Accepted Answer

A) =STDEV.S(Data) 
B) =STANDEV(Data) 
C) =STDEV.P(Data) 
D) =SUM(Data)/(COUNT(Data)−1) 
A) =STDEV.S(Data) 
B) =STANDEV(Data) 
C) =STDEV.P(Data) 
D) =SUM(Data)/(COUNT(Data)−1)

Question 4

The 25th percentile for waiting time in a doctor's office is 19 minutes.The 75th percentile is 31 minutes.The interquartile range (IQR)is

Accepted Answer

A) 12 minutes. 
B) 16 minutes. 
C) 22 minutes. 
D) impossible to determine without knowing n. 
A) 12 minutes. 
B) 16 minutes. 
C) 22 minutes. 
D) impossible to determine without knowing n.

Question 5

The position of the median is

Accepted Answer

A) n/2 in any sample. 
B) n/2 if n is even. 
C) n/2 if n is odd. 
D) (n+1)/2 in any sample. 
A) n/2 in any sample. 
B) n/2 if n is even. 
C) n/2 if n is odd. 
D) (n+1)/2 in any sample.

Question 6

A team of introductory statistics students went to a grocery store and recorded the total calories and fat calories for various kinds of soup.They produced a table of statistics and two dot plots.Write a succinct summary of the center,variability,and shape for each data set.Note: TrimMean is the 5 percent trimmed mean (removing the smallest 5 percent and the largest 5 percent of the values,rounded to the nearest integer).

Accepted Answer

Both are right-skewed (mean > median)tho

Question 7

A survey of 10 randomly chosen drivers showed the following number of persons per car,including the driver: 1,5,1,5,2,1,1,1,2,1.Describe the center,variability,and skewness for this sample.

Accepted Answer

Mean is 2,median is 1,mode is 1.For this

Question 8

Which is not a characteristic of the midhinge?

Accepted Answer

A) It lies halfway between Q1 and Q3. 
B) It is used to detect asymmetry. 
C) It is equal to the median in a symmetric data set. 
D) It is strongly affected by outliers. 
A) It lies halfway between Q1 and Q3. 
B) It is used to detect asymmetry. 
C) It is equal to the median in a symmetric data set. 
D) It is strongly affected by outliers.

Question 9

Twelve students were asked how many credit cards they owned.The responses were 0,0,1,2,2,3,3,4,4,5,5,11.(A)Find the mean,median,and mode.(B)Which measure of center seems best in this case? (C)Find the first and third quartiles.What do they tell you?

Accepted Answer

(A)Mean is 3.33,median is 3,mode is not

Question 10

John scored 35 on Prof.Johnson's exam (Q1 = 70 and Q3 = 80).Based on the fences,which is correct?

Accepted Answer

A) John is unusual but not an outlier. 
B) John is an outlier. 
C) John is neither unusual nor an outlier. 
D) John is in the 30th percentile. 
A) John is unusual but not an outlier. 
B) John is an outlier. 
C) John is neither unusual nor an outlier. 
D) John is in the 30th percentile.

Question 11

Eleven students were asked how many siblings they had.The responses were 0,1,2,2,2,2,2,3,3,4,5.Find the mean,median,mode,and geometric mean.Which would you prefer in this case,and why not the others?

Accepted Answer

Mean is 2.364,median is 2,mode is 2.Any

Question 12

A trimmed mean may be preferable to a mean when a data set has extreme values.

Accepted Answer

A) True 
 B)False

Question 13

It is inappropriate to apply the Empirical Rule to a population that is right-skewed.

Accepted Answer

A) True 
 B)False

Question 14

Which is true of skewness?

Accepted Answer

A) In business data,positive skewness is unusual. 
B) In a negatively skewed distribution,the mean is likely to exceed the median. 
C) Skewness often is evidenced by one or more outliers. 
D) The expected range of Excel's skewness coefficient increases as n increases. 
A) In business data,positive skewness is unusual. 
B) In a negatively skewed distribution,the mean is likely to exceed the median. 
C) Skewness often is evidenced by one or more outliers. 
D) The expected range of Excel's skewness coefficient increases as n increases.

Question 15

In a sample of 10,000 observations from a normal population,how many would you expect to lie beyond three standard deviations of the mean?

Accepted Answer

A) None of them 
B) About 27 
C) About 100 
D) About 127 
A) None of them 
B) About 27 
C) About 100 
D) About 127

Question 16

What does the graph below (profit/sales ratios for 25 Fortune 500 companies)reveal?

Accepted Answer

A) That the median exceeds the mean. 
B) That the data are slightly left-skewed. 
C) That the interquartile range is about 8. 
D) That the distribution is bell-shaped. 
A) That the median exceeds the mean. 
B) That the data are slightly left-skewed. 
C) That the interquartile range is about 8. 
D) That the distribution is bell-shaped.

Question 17

Three randomly chosen Colorado students were asked how many times they went rock climbing last month.Their replies were 5,6,7.The standard deviation is

Accepted Answer

A) 1.212 
B) 0.816 
C) 1.000 
D) 1.056 
A) 1.212 
B) 0.816 
C) 1.000 
D) 1.056

Question 18

The midhinge lies halfway between

Accepted Answer

A) xmin and xmax. 
B) Q1 and Q3. 
C) the mean and the median. 
D) the inner fences. 
A) xmin and xmax. 
B) Q1 and Q3. 
C) the mean and the median. 
D) the inner fences.

Question 19

Given the data set 2,5,10,6,3,the median value is 3.

Accepted Answer

A) True 
 B)False

Question 20

If the standard deviations of two samples are the same,so are their coefficients of variation.

Accepted Answer

A) True 
 B)False

Outliers are indicated using fences on a

Which is the Excel formula for the standard deviation of a sample array named Data?

The 25th percentile for waiting time in a doctor's office is 19 minutes.The 75th percentile is 31 minutes.The interquartile range (IQR)is

The position of the median is

A survey of 10 randomly chosen drivers showed the following number of persons per car,including the driver: 1,5,1,5,2,1,1,1,2,1.Describe the center,variability,and skewness for this sample.

Which is not a characteristic of the midhinge?

Twelve students were asked how many credit cards they owned.The responses were 0,0,1,2,2,3,3,4,4,5,5,11.(A)Find the mean,median,and mode.(B)Which measure of center seems best in this case? (C)Find the first and third quartiles.What do they tell you?

John scored 35 on Prof.Johnson's exam (Q1 = 70 and Q3 = 80).Based on the fences,which is correct?

Eleven students were asked how many siblings they had.The responses were 0,1,2,2,2,2,2,3,3,4,5.Find the mean,median,mode,and geometric mean.Which would you prefer in this case,and why not the others?

A trimmed mean may be preferable to a mean when a data set has extreme values.

It is inappropriate to apply the Empirical Rule to a population that is right-skewed.

Which is true of skewness?

In a sample of 10,000 observations from a normal population,how many would you expect to lie beyond three standard deviations of the mean?

What does the graph below (profit/sales ratios for 25 Fortune 500 companies)reveal?

Three randomly chosen Colorado students were asked how many times they went rock climbing last month.Their replies were 5,6,7.The standard deviation is

The midhinge lies halfway between

Given the data set 2,5,10,6,3,the median value is 3.

If the standard deviations of two samples are the same,so are their coefficients of variation.

Overview of Statistics

Data Collection

Describing Data Visually

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Chi-Square Tests

Filters

Exam 4: Descriptive Statistics

Outliers are indicated using fences on a

Which is the Excel formula for the standard deviation of a sample array named Data?

The 25th percentile for waiting time in a doctor's office is 19 minutes.The 75th percentile is 31 minutes.The interquartile range (IQR)is

The position of the median is

A survey of 10 randomly chosen drivers showed the following number of persons per car,including the driver: 1,5,1,5,2,1,1,1,2,1.Describe the center,variability,and skewness for this sample.

Which is not a characteristic of the midhinge?

Twelve students were asked how many credit cards they owned.The responses were 0,0,1,2,2,3,3,4,4,5,5,11.(A)Find the mean,median,and mode.(B)Which measure of center seems best in this case? (C)Find the first and third quartiles.What do they tell you?

John scored 35 on Prof.Johnson's exam (Q1 = 70 and Q3 = 80).Based on the fences,which is correct?

Eleven students were asked how many siblings they had.The responses were 0,1,2,2,2,2,2,3,3,4,5.Find the mean,median,mode,and geometric mean.Which would you prefer in this case,and why not the others?

A trimmed mean may be preferable to a mean when a data set has extreme values.

It is inappropriate to apply the Empirical Rule to a population that is right-skewed.

Which is true of skewness?

In a sample of 10,000 observations from a normal population,how many would you expect to lie beyond three standard deviations of the mean?

What does the graph below (profit/sales ratios for 25 Fortune 500 companies)reveal?

Three randomly chosen Colorado students were asked how many times they went rock climbing last month.Their replies were 5,6,7.The standard deviation is

The midhinge lies halfway between

Given the data set 2,5,10,6,3,the median value is 3.

If the standard deviations of two samples are the same,so are their coefficients of variation.

Overview of Statistics

Data Collection

Describing Data Visually

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Chi-Square Tests

Filters