Question 1

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 mode?

Accepted Answer

A) 70 
B) 75 
C) 68 
D) 71 
E) 80 
A) 70 
B) 75 
C) 68 
D) 71 
E) 80

Question 2

The population variance is the average of the squared deviations of the individual population measurements from the population mean.

Accepted Answer

A) True 
 B)False

Question 3

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 is the 10th percentile?

Accepted Answer

A) 100.8 
B) 119.8 
C) 128.8 
D) 112 
E) 122.5 
A) 100.8 
B) 119.8 
C) 128.8 
D) 112 
E) 122.5

Question 4

Suppose that a company's annual sales were $1,200,000 in 1999.The annual growth rate of sales from 1999 to 2000 was 16%,from 2000 to 2001 was -5%,and from 2001 to 2002 was 22%. The geometric mean growth rate of sales over this three-year period is calculated as 10.37%.Use the geometric mean growth rate and determine the forecasted sales for 2004.

Accepted Answer

A) 1,780,678 
B) 1,200,014 
C) 1,965,337 
D) 1,613,371 
E) 1,422,197 
A) 1,780,678 
B) 1,200,014 
C) 1,965,337 
D) 1,613,371 
E) 1,422,197

Question 5

In a survey of 550 randomly-selected college statistic students were surveyed on their impressions of their course,instructor and textbook.The results are as follows:   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 6

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 10th percentile?

Accepted Answer

A) 335.5 
B) 370.5 
C) 380.6 
D) 296.8 
E) 375 
A) 335.5 
B) 370.5 
C) 380.6 
D) 296.8 
E) 375

Question 7

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 IQR?

Accepted Answer

A) 12.00 
B) 5.25 
C) 10.25 
D) 5.00 
E) 11.00 
A) 12.00 
B) 5.25 
C) 10.25 
D) 5.00 
E) 11.00

Question 8

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 mode?

Accepted Answer

A) 71.5 
B) 72.0 
C) 77.0 
D) 71.0 
E) 73.0 
A) 71.5 
B) 72.0 
C) 77.0 
D) 71.0 
E) 73.0

Question 9

Compute the population variance of the data: 16,18,23,21,17,16,24,23,9,17,11,16,22,10,15,14.

Accepted Answer

A) 21.9 
B) 3.87 
C) 20.5 
D) 17.0 
E) 3.625 
A) 21.9 
B) 3.87 
C) 20.5 
D) 17.0 
E) 3.625

Question 10

An independent variable is a predictor variable that can be used to describe,predict,or control a dependent variable.

Accepted Answer

A) True 
 B)False

Question 11

The following table shows the Price-to-Earnings ratio for a Stereo equipment manufacturing company between 1998 and 2002.The annual percentage growth rate of the P/E ratios are also calculated and given below:   Calculate the geometric mean growth rate increase or decrease over the period from 1998 to 2002.

Accepted Answer

A) -.259 
B) -.139 
C) -.181 
D) .861 
E) .741 
A) -.259 
B) -.139 
C) -.181 
D) .861 
E) .741

Question 12

In a survey of 550 randomly-selected college statistic students were surveyed on their impressions of their course,instructor and textbook.The results are as follows:   Compute a point estimate of the proportion of all college statistic students who think the quality of the course was "fair"

Accepted Answer

A) 0.251 
B) 0.620 
C) 0.129 
D) 0.871 
E) 0.340 
A) 0.251 
B) 0.620 
C) 0.129 
D) 0.871 
E) 0.340

Question 13

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 median?

Accepted Answer

A) 70 
B) 75 
C) 68 
D) 71 
E) 80 
A) 70 
B) 75 
C) 68 
D) 71 
E) 80

Question 14

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 are the inner fences?

Accepted Answer

A) 1455,2910 
B) 4072,5042 
C) 5527,6497 
D) 1162,5042 
E) -293,6497 
A) 1455,2910 
B) 4072,5042 
C) 5527,6497 
D) 1162,5042 
E) -293,6497

Question 15

A measurement located outside the outer fences of a box-and-whisker display is _____.

Accepted Answer

A) always in the first quartile 
B) an outlier 
C) always the largest value in the data set 
D) within the inner fence 
A) always in the first quartile 
B) an outlier 
C) always the largest value in the data set 
D) within the inner fence

Question 16

If 50 of 500 sampled customers said they would make a purchase of a new TV set,what is the sample proportion?

Accepted Answer

A) .10 
B) .20 
C) .15 
D) .25 
A) .10 
B) .20 
C) .15 
D) .25

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 mean?

Accepted Answer

A) 71.5 
B) 72.0 
C) 77.0 
D) 71.0 
E) 73.0 
A) 71.5 
B) 72.0 
C) 77.0 
D) 71.0 
E) 73.0

Question 18

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 third 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 19

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 range?

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 20

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 10th percentile?

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

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 mode?

The population variance is the average of the squared deviations of the individual population measurements from the population mean.

In a survey of 550 randomly-selected college statistic students were surveyed on their impressions of their course,instructor and textbook.The results are as follows: Compute a point estimate of the proportion of all college statistic students who feel their textbook is not "easy" or "very easy"

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 10^th percentile?

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 IQR?

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 mode?

Compute the population variance of the data: 16,18,23,21,17,16,24,23,9,17,11,16,22,10,15,14.

An independent variable is a predictor variable that can be used to describe,predict,or control a dependent variable.

In a survey of 550 randomly-selected college statistic students were surveyed on their impressions of their course,instructor and textbook.The results are as follows: Compute a point estimate of the proportion of all college statistic students who think the quality of the course was "fair"

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 median?

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 are the inner fences?

A measurement located outside the outer fences of a box-and-whisker display is _____.

If 50 of 500 sampled customers said they would make a purchase of a new TV set,what is the sample proportion?

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 mean?

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 third quartile?

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 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

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 mode?

The population variance is the average of the squared deviations of the individual population measurements from the population mean.

In a survey of 550 randomly-selected college statistic students were surveyed on their impressions of their course,instructor and textbook.The results are as follows: Compute a point estimate of the proportion of all college statistic students who feel their textbook is not "easy" or "very easy"

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 10th percentile?

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 IQR?

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 mode?

Compute the population variance of the data: 16,18,23,21,17,16,24,23,9,17,11,16,22,10,15,14.

An independent variable is a predictor variable that can be used to describe,predict,or control a dependent variable.

In a survey of 550 randomly-selected college statistic students were surveyed on their impressions of their course,instructor and textbook.The results are as follows: Compute a point estimate of the proportion of all college statistic students who think the quality of the course was "fair"

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 median?

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 are the inner fences?

A measurement located outside the outer fences of a box-and-whisker display is _____.

If 50 of 500 sampled customers said they would make a purchase of a new TV set,what is the sample proportion?

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 mean?

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 third quartile?

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 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

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 10^th percentile?