Question 1

From a population of size 500, a random sample of 50 items is selected. The mode of the sample

Accepted Answer

A)  must be 500 
B)  must be equal to the mode of population, if the sample is truly random 
C)  must be equal to the mean of the population, if the sample is truly random 
D)  can be larger, smaller or equal to the mode of the population 
A)  must be 500 
B)  must be equal to the mode of population, if the sample is truly random 
C)  must be equal to the mean of the population, if the sample is truly random 
D)  can be larger, smaller or equal to the mode of the population

Question 2

The descriptive measure of dispersion that is based on the concept of a deviation about the mean is

Accepted Answer

A)  the range 
B)  the interquartile range 
C)  the absolute value of the range 
D)  the standard deviation 
A)  the range 
B)  the interquartile range 
C)  the absolute value of the range 
D)  the standard deviation

Question 3

When the smallest and largest percentage of items are removed from a data set and the mean is computed, the mean of the remaining data is

Accepted Answer

A)  the median 
B)  the mode 
C)  the trimmed mean 
D)  any of the above 
A)  the median 
B)  the mode 
C)  the trimmed mean 
D)  any of the above

Question 4

The heights in inches) of 25 individuals were recorded and the following statistics were calculated mean = 70 range = 20
Mode = 73 variance = 784
Median = 74
The coefficient of variation equals

Accepted Answer

A)  11.2% 
B)  1120% 
C)  0.4% 
D)  40% 
A)  11.2% 
B)  1120% 
C)  0.4% 
D)  40%

Question 5

The most important statistical descriptive measure of the location of a data set is the

Accepted Answer

A)  mean 
B)  median 
C)  mode 
D)  variance 
A)  mean 
B)  median 
C)  mode 
D)  variance

Question 6

A bar chart in which each bar is broken into rectangular segments of a different color showing the relative frequency of each class in a manner similar to a pie chart.is referred to as a

Accepted Answer

A)  side by side chart 
B)  frequency bar chart 
C)  broken bar chart 
D)  stacked bar chart 
A)  side by side chart 
B)  frequency bar chart 
C)  broken bar chart 
D)  stacked bar chart

Question 7

Population of a city for the years 2010 through 2014 are shown below.
 $$\begin{array} { | c | c | } 
\hline \text { Year } & \text { Population } \
\hline 2010 & 165,927 \
\hline 2011 & 168,293 \
\hline 2012 & 169,847 \
\hline 2013 & 170,819 \
\hline 2014 & 171,350 \
\hline
\end{array}$$ 
a. Compute the growth rate for the years 2011 through 2014.
b. Compute the geometric mean.
c. What has been the percentage of growth in the population of the city between 2011 to 2014?

Accepted Answer

a.
 @#IMG-DLM& b. Ge

Question 8

A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances.
 $\begin{array}{cc}\text { Unpaid Balance }&\text { Frequency }\
10-29 & 1 \
30-49 & 6 \
50-69 & 9 \
70-89 & 11 \
90-109 & 13
\end{array}$ 
a. Determine the mean unpaid balance.
b. Determine the variance.
c. Determine the standard deviation.
d. Compute the coefficient of variation.

Accepted Answer

a. 74
b. 5

Question 9

A box plot is a graphical technique which is used for

Accepted Answer

A)  only one group of data 
B)  making comparisons between only two groups 
C)  making comparisons between two or more groups 
D)  summing the deviations from the mean and placing the sum in a box 
A)  only one group of data 
B)  making comparisons between only two groups 
C)  making comparisons between two or more groups 
D)  summing the deviations from the mean and placing the sum in a box

Question 10

From a population of size 400, a random sample of 40 items is selected. The median of the sample

Accepted Answer

A)  must be 200, since 400 divided by 2 is 200 
B)  must be 10, since 400 divided by 400 is 10 
C)  must be equal to the median of population, if the sample is truly random 
D)  None of these alternatives is correct. 
A)  must be 200, since 400 divided by 2 is 200 
B)  must be 10, since 400 divided by 400 is 10 
C)  must be equal to the median of population, if the sample is truly random 
D)  None of these alternatives is correct.

Question 11

The coefficient of correlation

Accepted Answer

A)  is the same as the coefficient of determination 
B)  can be larger than 1 
C)  cannot be larger than 1 
D)  cannot be negative 
A)  is the same as the coefficient of determination 
B)  can be larger than 1 
C)  cannot be larger than 1 
D)  cannot be negative

Question 12

Exhibit 3-3
A researcher has collected the following sample data. The mean of the sample is 5.
3 5 12 3 2
-Refer to Exhibit 3-3. The coefficient of variation is

Accepted Answer

A)  72.66% 
B)  81.24% 
C)  264% 
D)  330% 
A)  72.66% 
B)  81.24% 
C)  264% 
D)  330%

Question 13

The last semester grades of Nancy, a freshman at a local college are shown below.
 $\begin{array}{lll}\text { Course } & \text { Credit Hours }&\text { Grades }\
\text { Physics } & 4 & \text { C } \
\text { Calculus } & 6 & \text { A } \
\text { Biology } & 3 & \text { B } \
\text { Music } & 2 & \text { F } \
\text { P.E } & 1 & \text { A }
\end{array}$ The local university uses a 4 point grading system, i.e., A = 4, B = 3, C = 2, D = 1, F = 0. Compute Nancy's
semester grade point average.

Accepted Answer

The answer of The last semester grades of Nancy, a...

Question 14

Exhibit 3-6
The closing stock price of MNM Corporation for the last 7 trading days is shown below.
 $\begin{array}{ll}\text { Day }&\text { Stock Price }\
1 & 84 \
2 & 87 \
3 & 84 \
4 & 88 \
5 & 85 \
6 & 90 \
7 & 91
\end{array}$
-Refer to Exhibit 3-6. The variance is

Accepted Answer

A)  2.828 
B)  8 
C)  9 
D)  81 
A)  2.828 
B)  8 
C)  9 
D)  81

Question 15

The following data show the yearly salaries of football coaches at some state supported universities.
 $\begin{array}{ll}&\text { Salary in }\
\text { University } & \mathbf{\$ 1 , 0 0 0 )} \
\mathrm{A} & 53 \
\mathrm{~B} & 44 \
\mathrm{C} & 68 \
\mathrm{D} & 47 \
\mathrm{E} & 62 \
\mathrm{~F} & 59 \
\mathrm{G} & 53 \
\mathrm{H} & 94
\end{array}$ For the above sample, determine the following measures. 
a. The mean yearly salary
b. The standard deviation
c. The mode
d. The median
e. The 70th percentile

Accepted Answer

a. 60
b. 1

Question 16

Exhibit 3-3
A researcher has collected the following sample data. The mean of the sample is 5.
3 5 12 3 2
-Refer to Exhibit 3-3. The standard deviation is

Accepted Answer

A)  8.944 
B)  4.062 
C)  13.2 
D)  16.5 
A)  8.944 
B)  4.062 
C)  13.2 
D)  16.5

Question 17

The interquartile range is used as a measure of variability to overcome what difficulty of the range?

Accepted Answer

A)  the sum of the range variances is zero 
B)  the range is difficult to compute 
C)  the range is influenced too much by extreme values 
D)  the range is negative 
A)  the sum of the range variances is zero 
B)  the range is difficult to compute 
C)  the range is influenced too much by extreme values 
D)  the range is negative

From a population of size 500, a random sample of 50 items is selected. The mode of the sample

The descriptive measure of dispersion that is based on the concept of a deviation about the mean is

When the smallest and largest percentage of items are removed from a data set and the mean is computed, the mean of the remaining data is

The heights in inches) of 25 individuals were recorded and the following statistics were calculated mean = 70 range = 20 Mode = 73 variance = 784 Median = 74 The coefficient of variation equals

The most important statistical descriptive measure of the location of a data set is the

A bar chart in which each bar is broken into rectangular segments of a different color showing the relative frequency of each class in a manner similar to a pie chart.is referred to as a

A box plot is a graphical technique which is used for

From a population of size 400, a random sample of 40 items is selected. The median of the sample

The coefficient of correlation

Exhibit 3-3 A researcher has collected the following sample data. The mean of the sample is 5. 3 5 12 3 2 -Refer to Exhibit 3-3. The coefficient of variation is

Exhibit 3-6 The closing stock price of MNM Corporation for the last 7 trading days is shown below. Day Stock Price 1 84 2 87 3 84 4 88 5 85 6 90 7 91 -Refer to Exhibit 3-6. The variance is

Exhibit 3-3 A researcher has collected the following sample data. The mean of the sample is 5. 3 5 12 3 2 -Refer to Exhibit 3-3. The standard deviation is

The interquartile range is used as a measure of variability to overcome what difficulty of the range?

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Filters

Exam 3: Descriptive Statistics: Numerical Measures

From a population of size 500, a random sample of 50 items is selected. The mode of the sample

The descriptive measure of dispersion that is based on the concept of a deviation about the mean is

When the smallest and largest percentage of items are removed from a data set and the mean is computed, the mean of the remaining data is

The heights in inches) of 25 individuals were recorded and the following statistics were calculated mean = 70 range = 20 Mode = 73 variance = 784 Median = 74 The coefficient of variation equals

The most important statistical descriptive measure of the location of a data set is the

A bar chart in which each bar is broken into rectangular segments of a different color showing the relative frequency of each class in a manner similar to a pie chart.is referred to as a

A box plot is a graphical technique which is used for

From a population of size 400, a random sample of 40 items is selected. The median of the sample

The coefficient of correlation

Exhibit 3-3 A researcher has collected the following sample data. The mean of the sample is 5. 3 5 12 3 2 -Refer to Exhibit 3-3. The coefficient of variation is

Exhibit 3-6 The closing stock price of MNM Corporation for the last 7 trading days is shown below. Day Stock Price 1 84 2 87 3 84 4 88 5 85 6 90 7 91 -Refer to Exhibit 3-6. The variance is

Exhibit 3-3 A researcher has collected the following sample data. The mean of the sample is 5. 3 5 12 3 2 -Refer to Exhibit 3-3. The standard deviation is

The interquartile range is used as a measure of variability to overcome what difficulty of the range?

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Comparisons Involving Means, Experimental Design, and Analysis of Variance

Comparisons Involving Proportions and a Test of Independence

Simple Linear Regression

Multiple Regression

Filters