Question 1

The point estimate of the population _______________ is the positive square root of the sample variance.

Accepted Answer

The answer of The point estimate of the population _______________...

Question 2

In a survey of 550 randomly-selected business statistic students were surveyed on their impressions of their course, instructor, and textbook. The results are as follows:
$\begin{array} { ll l }
 \text {Rate the overall quality of your course. } \&\text { Excellent } & 154 \
&\text { Good } & 187 \
&\text { Fair } & 71 \
&\text { Poor } & 138\
 \text { How effective was your instructor?} \&\text { Very effective } & 75 \
&\text { Somewhat effective } & 220 \
&\text { Somewhat ineffective } & 155 \
&\text { Very ineffective } & 100\
 \text {How easy was it to read and understand the textbook? } \
&\text { Very easy } & 21 \
&\text { Easy } & 83 \
&\text { Hard } & 361 \
&\text { Very hard } & 85
\end{array}$

Use the above results to answer the following questions:
Compute a point estimate of the proportion of all college statistic students who:

-Feel their textbook is not "easy" or "very easy"

Accepted Answer

A) 0.189 
B) 0.811 
C) 0.009 
D) 0.656 
E) 0.151 
A) 0.189 
B) 0.811 
C) 0.009 
D) 0.656 
E) 0.151

Question 3

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

Accepted Answer

coefficien

Question 4

The numbers of rooms for 15 home recently sold were;
8, 8, 8, 5, 9, 8, 7, 6, 6, 7, 7, 7, 7, 9, 9
-What is the third quartile?

Accepted Answer

A) 9 
B) 8 
C) 7 
D) 6 
E) 5 
A) 9 
B) 8 
C) 7 
D) 6 
E) 5

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 stop watch to record the time they spent in line. The times recorded were as follows (in minutes) (mean = 114.15):
118, 124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118

-What is the variance?

Accepted Answer

A) 103 
B) 23.62 
C) 557.97 
D) 128.8 
E) 115 
A) 103 
B) 23.62 
C) 557.97 
D) 128.8 
E) 115

Question 6

What are three important properties of any data set?

Accepted Answer

central te

Question 7

If there are 7 classes in a frequency distribution,then the fourth class will always contain the median.

Accepted Answer

A) True 
 B)False

Question 8

What is the first quartile?

Accepted Answer

A) $1,446.5 
B) $2,995 
C) $3,415.75 
D) $3,587 
E) $4,212 
A) $1,446.5 
B) $2,995 
C) $3,415.75 
D) $3,587 
E) $4,212

Question 9

The 550 students answered an additional question with the following results based on their rating of their instructor:
$$\begin{array} { | c | c | c | } 
\hline & \text { Very or Somewhat Effective } & \text { Very or Somewhat Ineffective } \
\hline \text { Final Grade } & & \
\hline \text { A } & 190 & 85 \
\hline \text { B } & 75 & 120 \
\hline \text { C } & 20 & 17 \
\hline \text { D } & 9 & 18 \
\hline \text { F } & 1 & 15 \
\hline
\end{array}$$
$\begin{array} { ll l }
 \text {Rate the overall quality of your course. } \&\text { Excellent } & 154 \
&\text { Good } & 187 \
&\text { Fair } & 71 \
&\text { Poor } & 138\
 \text { How effective was your instructor?} \&\text { Very effective } & 75 \
&\text { Somewhat effective } & 220 \
&\text { Somewhat ineffective } & 155 \
&\text { Very ineffective } & 100\
 \text {How easy was it to read and understand the textbook? } \
&\text { Very easy } & 21 \
&\text { Easy } & 83 \
&\text { Hard } & 361 \
&\text { Very hard } & 85
\end{array}$

Use the above results to answer the following questions:
Compute a point estimate of the proportion of all college statistic students who:

-What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?

Accepted Answer

A) 0.345 
B) 0.254 
C) 0.482 
D) 0.898 
E) 0.644 
A) 0.345 
B) 0.254 
C) 0.482 
D) 0.898 
E) 0.644

Question 10

In a statistic class, 10 scores were randomly selected with the following results were obtained (mean = 71.5):
74, 73, 77, 77, 71, 68, 65, 77, 67, 66

-What is the variance?

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

Question 11

According to a survey of the top 10 employers in a major city, 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.
-According to Chebyshev's Theorem,at least what percentage of measurements in a data set will be within two standard deviations of the mean?

Accepted Answer

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

Question 12

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
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 13

The numbers of rooms for 15 homes recently sold were:
8, 8, 8, 5, 9, 8, 7, 6, 6, 7, 7, 7, 7, 9, 9

-What is the mode?

Accepted Answer

A) 8.0 
B) 7.0 
C) 6.0 
D) 9.0 
E) 7.4 
A) 8.0 
B) 7.0 
C) 6.0 
D) 9.0 
E) 7.4

Question 14

The values given below are snow depths measured as part of a study of satellite observations and water resources (mean = 16).
19, 18, 12, 25, 22, 8, 8, 16

-What is the variance?

Accepted Answer

A) 39.14 
B) 6.26 
C) 17 
D) 289 
E) 18 
A) 39.14 
B) 6.26 
C) 17 
D) 289 
E) 18

Question 15

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) (mean = 114.15):
118, 124, 108, 116, 99, 120, 148, 118, 119, 121, 45, 130, 118

-What is the standard deviation?

Accepted Answer

A) 103 
B) 23.62 
C) 557.97 
D) 128.8 
E) 115 
A) 103 
B) 23.62 
C) 557.97 
D) 128.8 
E) 115

Question 16

According to a survey of the top 10 employers in a major city, 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.
-Within which interval will the times of approximately 68.26% of all workers fall?

Accepted Answer

A) [394.8,431.2] 
B) [386.2,439.8] 
C) [372.8,453.2] 
D) [359.4,466.6] 
E) [332.6,493.4] 
A) [394.8,431.2] 
B) [386.2,439.8] 
C) [372.8,453.2] 
D) [359.4,466.6] 
E) [332.6,493.4]

Question 17

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 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 18

Describe the shape of a population distribution,if the median is greater than the mean.

Accepted Answer

Skewed to

Question 19

A ______________ displays the frequency of each group with qualitative data and a __________ displays the frequency of each group with quantitative data.

Accepted Answer

A) histogram,stem-and-leaf display 
B) bar chart,histogram 
C) scatter plot,bar chart 
D) stem-and-leaf display,pie chart 
E) scatter plot,pie chart 
A) histogram,stem-and-leaf display 
B) bar chart,histogram 
C) scatter plot,bar chart 
D) stem-and-leaf display,pie chart 
E) scatter plot,pie chart

Question 20

A plot of the values of a dependent variable y versus the values of an independent variable x is a _____ plot.

Accepted Answer

A) runs 
B) scatter 
C) dot 
D) time series 
E) box 
A) runs 
B) scatter 
C) dot 
D) time series 
E) box

The point estimate of the population _______________ is the positive square root of the sample variance.

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

The numbers of rooms for 15 home recently sold were; 8, 8, 8, 5, 9, 8, 7, 6, 6, 7, 7, 7, 7, 9, 9 -What is the third quartile?

What are three important properties of any data set?

If there are 7 classes in a frequency distribution,then the fourth class will always contain the median.

What is the first quartile?

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

The numbers of rooms for 15 homes recently sold were: 8, 8, 8, 5, 9, 8, 7, 6, 6, 7, 7, 7, 7, 9, 9 -What is the mode?

The values given below are snow depths measured as part of a study of satellite observations and water resources (mean = 16). 19, 18, 12, 25, 22, 8, 8, 16 -What is the variance?

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 is the mean?

Describe the shape of a population distribution,if the median is greater than the mean.

A ____ displays the frequency of each group with qualitative data and a displays the frequency of each group with quantitative data.

A plot of the values of a dependent variable y versus the values of an independent variable x is a _____ plot.

An Introduction to Business Statistics

Probability

Discrete Random Variables

Continuous Random Variables

Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Correlation Coefficient and Simple Linear Regression Analysis

Multiple Regression and Model Building

Nonparametric Methods

Chi-Square Tests

Decision Theory

Time Series Forecasting

Filters

Exam 2: Descriptive Statistics

The point estimate of the population _______________ is the positive square root of the sample variance.

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

The numbers of rooms for 15 home recently sold were; 8, 8, 8, 5, 9, 8, 7, 6, 6, 7, 7, 7, 7, 9, 9 -What is the third quartile?

What are three important properties of any data set?

If there are 7 classes in a frequency distribution,then the fourth class will always contain the median.

What is the first quartile?

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

The numbers of rooms for 15 homes recently sold were: 8, 8, 8, 5, 9, 8, 7, 6, 6, 7, 7, 7, 7, 9, 9 -What is the mode?

The values given below are snow depths measured as part of a study of satellite observations and water resources (mean = 16). 19, 18, 12, 25, 22, 8, 8, 16 -What is the variance?

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 is the mean?

Describe the shape of a population distribution,if the median is greater than the mean.

A ______________ displays the frequency of each group with qualitative data and a __________ displays the frequency of each group with quantitative data.

A plot of the values of a dependent variable y versus the values of an independent variable x is a _____ plot.

An Introduction to Business Statistics

Probability

Discrete Random Variables

Continuous Random Variables

Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Correlation Coefficient and Simple Linear Regression Analysis

Multiple Regression and Model Building

Nonparametric Methods

Chi-Square Tests

Decision Theory

Time Series Forecasting

Filters

A ____ displays the frequency of each group with qualitative data and a displays the frequency of each group with quantitative data.