Question 1

Consider a sample with the following data values.
   Compute the Z scores for the above five observations.

Accepted Answer

Mean = 434

Question 2

A local university administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of examinations are selected at random and scored. The results are shown below.
   For the above data, determine 
a.The mean
b.The median
c.The mode
d.The standard deviation
e.
The coefficient of variation

Accepted Answer

a.83
b.86

Question 3

The variance of a sample was reported to be 144. The report indicated that   = 7200. What has been the sample size?

Accepted Answer

A) 49 
B) 50 
C) 51 
D) 52 
A) 49 
B) 50 
C) 51 
D) 52

Question 4

Positive values of covariance indicate

Accepted Answer

A) a positive variance of the x values 
B) a positive variance of the y values 
C) the standard deviation is positive 
D) positive relation between the independent and the dependent variables 
A) a positive variance of the x values 
B) a positive variance of the y values 
C) the standard deviation is positive 
D) positive relation between the independent and the dependent variables

Question 5

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 6

The average wage of Tennessee cashiers is $14 per hour with a standard deviation of $4.20. In Georgia, the average wage of cashiers is $16 with a standard deviation of $4.40. In which state do the wages of cashiers appear to be more dispersed?

Accepted Answer

The coefficient of variation i

Question 7

The variance of a sample was reported to be 81. The report indicated that   = 972. What has been the sample size?

Accepted Answer

The answer of The variance of a sample was reported...

Question 8

A group of students had dinner at a local restaurant. The total bill for the dinner was $414.70. Each student paid his/her equal share of the bill, which was $18.85. How many student's were at the dinner?

Accepted Answer

A) 4 
B) 415 
C) 19 
D) 22 
A) 4 
B) 415 
C) 19 
D) 22

Question 9

Exhibit 3-2
A researcher has collected the following sample data
  
-Refer to Exhibit 3-2. The 75th percentile is

Accepted Answer

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

Question 10

For the following frequency distribution (assume the data represent a population),
   
a.Compute the mean.
b.Compute the standard deviation.

Accepted Answer

a.95
b.12.

Question 11

The 50th percentile is the

Accepted Answer

A) mode 
B) median 
C) mean 
D) third quartile 
A) mode 
B) median 
C) mean 
D) third quartile

Question 12

The standard deviation of a sample was reported to be 20. The report indicated that   = 7200. What has been the sample size?

Accepted Answer

A) 16 
B) 17 
C) 18 
D) 19 
A) 16 
B) 17 
C) 18 
D) 19

Question 13

Which of the following symbols represents the mean of the sample?

Accepted Answer

A)  $\sigma$2 
B)  $\sigma$ 
C) $\mu$ 
D) $ \overline{\mathrm{x}} $ 
A)  $\sigma$2 
B)  $\sigma$ 
C) $\mu$ 
D) $ \overline{\mathrm{x}} $

Question 14

The median is a measure of

Accepted Answer

A) relative dispersion 
B) absolute dispersion 
C) central location 
D) relative location 
A) relative dispersion 
B) absolute dispersion 
C) central location 
D) relative location

Question 15

If the variance of a data set is correctly computed with the formula using n - 1 in the denominator, which of the following is true?

Accepted Answer

A) the data set is a sample 
B) the data set is a population 
C) the data set could be either a sample or a population 
D) the data set is from a census 
A) the data set is a sample 
B) the data set is a population 
C) the data set could be either a sample or a population 
D) the data set is from a census

Question 16

The 75th percentile is referred to as the

Accepted Answer

A) first quartile 
B) second quartile 
C) third quartile 
D) fourth quartile 
A) first quartile 
B) second quartile 
C) third quartile 
D) fourth quartile

Question 17

The following frequency distribution shows the yearly tuition (in $1,000s) of a sample of private colleges.
   For the above data, compute the mean yearly tuition. (Give your answer in dollars.)

Accepted Answer

The answer of The following frequency distribution shows the yearly...

Question 18

The following data show the yearly salaries of a sample of EMBA graduates.
   
a.Compute the mean yearly salary and give your answer in dollars.
b.Compute the standard deviation and give your answer in dollars.
c.Compute the 75th percentile and give your answer in dollars. Fully explain what the value that you have determined indicates.

Accepted Answer

a.$98,000
b.$9,355.03
c.$104,0

Question 19

Global Engineers hired the following number of Class 1 engineers during the first six months of the past year. (Assume the data represent a sample.)
No. of Class 1
Month Engineers Hired
January 3
February 2
March 4
April 2
May 6
June 0
a.Determine the mean, the median, the mode, and the range for the above data.
b.Compute the variance and the standard deviation.
c.Compute the first and the third quartiles.
d.Compute the z-scores for the months of May and June.

Accepted Answer

a.Mean = 2.833 Median = 2.5 Mo

Question 20

Since the population size is always larger than the sample size, then the sample statistic

Accepted Answer

A) can never be larger than the population parameter 
B) can never be equal to the population parameter 
C) can be smaller, larger, or equal to the population parameter 
D) can never be smaller than the population parameter 
A) can never be larger than the population parameter 
B) can never be equal to the population parameter 
C) can be smaller, larger, or equal to the population parameter 
D) can never be smaller than the population parameter

Consider a sample with the following data values. Compute the Z scores for the above five observations.

The variance of a sample was reported to be 144. The report indicated that = 7200. What has been the sample size?

Positive values of covariance indicate

The coefficient of correlation

The average wage of Tennessee cashiers is $14 per hour with a standard deviation of $4.20. In Georgia, the average wage of cashiers is $16 with a standard deviation of $4.40. In which state do the wages of cashiers appear to be more dispersed?

The variance of a sample was reported to be 81. The report indicated that = 972. What has been the sample size?

A group of students had dinner at a local restaurant. The total bill for the dinner was $414.70. Each student paid his/her equal share of the bill, which was $18.85. How many student's were at the dinner?

Exhibit 3-2 A researcher has collected the following sample data -Refer to Exhibit 3-2. The 75th percentile is

For the following frequency distribution (assume the data represent a population), a.Compute the mean. b.Compute the standard deviation.

The 50th percentile is the

The standard deviation of a sample was reported to be 20. The report indicated that = 7200. What has been the sample size?

Which of the following symbols represents the mean of the sample?

The median is a measure of

If the variance of a data set is correctly computed with the formula using n - 1 in the denominator, which of the following is true?

The 75th percentile is referred to as the

The following frequency distribution shows the yearly tuition (in $1,000s) of a sample of private colleges. For the above data, compute the mean yearly tuition. (Give your answer in dollars.)

Since the population size is always larger than the sample size, then the sample statistic

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

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

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Exam 3: Descriptive Statistics: Numerical Measures

Consider a sample with the following data values. Compute the Z scores for the above five observations.

The variance of a sample was reported to be 144. The report indicated that = 7200. What has been the sample size?

Positive values of covariance indicate

The coefficient of correlation

The average wage of Tennessee cashiers is $14 per hour with a standard deviation of $4.20. In Georgia, the average wage of cashiers is $16 with a standard deviation of $4.40. In which state do the wages of cashiers appear to be more dispersed?

The variance of a sample was reported to be 81. The report indicated that = 972. What has been the sample size?

A group of students had dinner at a local restaurant. The total bill for the dinner was $414.70. Each student paid his/her equal share of the bill, which was $18.85. How many student's were at the dinner?

Exhibit 3-2 A researcher has collected the following sample data -Refer to Exhibit 3-2. The 75th percentile is

For the following frequency distribution (assume the data represent a population), a.Compute the mean. b.Compute the standard deviation.

The 50th percentile is the

The standard deviation of a sample was reported to be 20. The report indicated that = 7200. What has been the sample size?

Which of the following symbols represents the mean of the sample?

The median is a measure of

If the variance of a data set is correctly computed with the formula using n - 1 in the denominator, which of the following is true?

The 75th percentile is referred to as the

The following frequency distribution shows the yearly tuition (in $1,000s) of a sample of private colleges. For the above data, compute the mean yearly tuition. (Give your answer in dollars.)

Since the population size is always larger than the sample size, then the sample statistic

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

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