Question 1

Which of the following factors does sample size depend on?

Accepted Answer

A) size of population, number of groups and subgroups within the sample 
B) accuracy required of the results 
C) cost of the sample 
D) variability of the population 
E) all of the above 
A) size of population, number of groups and subgroups within the sample 
B) accuracy required of the results 
C) cost of the sample 
D) variability of the population 
E) all of the above

Question 2

If we wanted to be 95 percent confident that we wouldn't make an error of more than 1 unit in our estimate of   for  = 2), we would need a sample size of approximately 16.

Accepted Answer

A) True 
 B)False

Question 3

When a complex multi-stage design is involved, a common approach is to replicate the entire sampling plan and get various independent estimates of the sample mean.

Accepted Answer

A) True 
 B)False

Question 4

Let the variance of a normally distributed random sample be 16.A point that is 8 units away from the mean is

Accepted Answer

The answer of Let the variance of a normally distributed...

Question 5

Assume that   is distributed normally with   = 0,  2 = 1.What is Pz = 1)?

Accepted Answer

A) 0.8413 
B) 0.1587 
C) 0.3413 
D) 0.0025 
E) None of the above
Use the following information for questions 26 through 28
Consider a meat packing plant which produces packages of frozen
Steak.Let X be the weight ounces) and assume that X is normally
Distributed with  x = 8.0 and  x = .5, n sample size) = 16. 
A) 0.8413 
B) 0.1587 
C) 0.3413 
D) 0.0025 
E) None of the above
Use the following information for questions 26 through 28
Consider a meat packing plant which produces packages of frozen
Steak.Let X be the weight ounces) and assume that X is normally
Distributed with  x = 8.0 and  x = .5, n sample size) = 16.

Question 6

The sample mean is not known, but it can be estimated from the population characteristics.

Accepted Answer

A) True 
 B)False

Question 7

The distribution which we say always assume to be "normal" or bell shaped is the 
a) sampling distribution 
b) population distribution 
c) sample distribution
d) variance distribution 
e) standard distribution

Accepted Answer

The answer of The distribution which we say always assume...

Question 8

If the population variance is 4, the sample standard deviation must be 2.

Accepted Answer

A) True 
 B)False

Question 9

Bo Derek calculates that she needs a sample size of 200, given the estimated mean, accuracy variance and required Z-score.However, she learns that the variance is actually one-half of what she originally believed.Her required sample size will now be 
a) 100 
b) 800 
c) 400 
d) 50 
e) none of the above

Accepted Answer

The answer of Bo Derek calculates that she needs a...

Question 10

Which of the following statements is true?

Accepted Answer

A) The sample size required to ensure 95 percent confidence limits will be smaller than that for 90 percent confidence limits. 
B) The sample size required to ensure a smaller confidence interval will also be smaller. 
C) The only way to reduce the width of a confidence interval is to reduce the confidence requirements. 
D) The required sample size is dependent on å only. 
E) The required sample size for given error and confidence levels is independent of the population size. 
A) The sample size required to ensure 95 percent confidence limits will be smaller than that for 90 percent confidence limits. 
B) The sample size required to ensure a smaller confidence interval will also be smaller. 
C) The only way to reduce the width of a confidence interval is to reduce the confidence requirements. 
D) The required sample size is dependent on å only. 
E) The required sample size for given error and confidence levels is independent of the population size.

Question 11

The probability that X1 will exceed 9 ounces is closest to

Accepted Answer

A) 0.3085 
B) 0.1587 
C) 0.1056 
D) 0.0256 
E) 0.0100 
A) 0.3085 
B) 0.1587 
C) 0.1056 
D) 0.0256 
E) 0.0100

Question 12

a 90 percent confidence interval cannot be determined

Accepted Answer

The answer of a 90 percent confidence interval cannot be...

Question 13

a point such that the probability of getting any other

Accepted Answer

point further from t

Question 14

Before the sample is drawn, the probability that the sample mean will exceed 9 ounces is closest to

Accepted Answer

A) 0.3085 
B) 0.1587 
C) 0.1056 
D) 0.0256 
E) 0.0100 
A) 0.3085 
B) 0.1587 
C) 0.1056 
D) 0.0256 
E) 0.0100

Question 15

The two population characteristics of most interest to researchers are   and The two population characteristics of most interest to researchers.

Accepted Answer

A) True 
 B)False

Question 16

A researcher takes a modest sample and, if results are worthwhile, opts for a larger sample.This type of sampling is called sequential sampling.

Accepted Answer

A) True 
 B)False

Question 17

What happens to the standard deviation of the sample mean, if we change the sample size from 25 to 100?

Accepted Answer

A) It is decreased by a factor of 4. 
B) It is increased by a factor of 4. 
C) It is decreased by a factor of 2. 
D) It is decreased by a factor of 16. 
E) None of the above. 
A) It is decreased by a factor of 4. 
B) It is increased by a factor of 4. 
C) It is decreased by a factor of 2. 
D) It is decreased by a factor of 16. 
E) None of the above.

Question 18

A market research firm has been engaged to do a study of dishwashing detergents preferred by homemakers in San Francisco 800,000 population) as compared to those preferred in New York 8,000,000 population).In order to obtain results of about equal reliability in each city, the number of homemakers polled in New York should be

Accepted Answer

A) ten times the number polled in San Francisco. 
B) 10 or 3.16 times the number polled in San Francisco. 
C) about the same as in San Francisco. 
D) half the number polled in San Francisco. 
A) ten times the number polled in San Francisco. 
B) 10 or 3.16 times the number polled in San Francisco. 
C) about the same as in San Francisco. 
D) half the number polled in San Francisco.

Question 19

If all members of the population have identical opinions on an issue, a sample of one is unsatisfactory.

Accepted Answer

A) True 
 B)False

Question 20

The standard error of the mean is the same as the 
a) standard deviation of the population 
b) standard deviation of the normal distribution 
c) standard deviation of the sampling distribution 
d) none of the above

Accepted Answer

The answer of The standard error of the mean is...

Exam 15: Sample Size and Statistical Theory

Which of the following factors does sample size depend on?

If we wanted to be 95 percent confident that we wouldn't make an error of more than 1 unit in our estimate of for = 2), we would need a sample size of approximately 16.

When a complex multi-stage design is involved, a common approach is to replicate the entire sampling plan and get various independent estimates of the sample mean.

Let the variance of a normally distributed random sample be 16.A point that is 8 units away from the mean is

Assume that is distributed normally with 11efcb9a_a811_8fc8_b057_bbe19516e4bb_TB7490_00 = 0, 11efcb9a_a811_8fc8_b057_bbe19516e4bb_TB7490_002 = 1.What is Pz = 1)?

The sample mean is not known, but it can be estimated from the population characteristics.

The distribution which we say always assume to be "normal" or bell shaped is the a) sampling distribution b) population distribution c) sample distribution d) variance distribution e) standard distribution

If the population variance is 4, the sample standard deviation must be 2.

Bo Derek calculates that she needs a sample size of 200, given the estimated mean, accuracy variance and required Z-score.However, she learns that the variance is actually one-half of what she originally believed.Her required sample size will now be a) 100 b) 800 c) 400 d) 50 e) none of the above

Which of the following statements is true?

The probability that X1 will exceed 9 ounces is closest to

a 90 percent confidence interval cannot be determined

a point such that the probability of getting any other

Before the sample is drawn, the probability that the sample mean will exceed 9 ounces is closest to

The two population characteristics of most interest to researchers are and The two population characteristics of most interest to researchers.

A researcher takes a modest sample and, if results are worthwhile, opts for a larger sample.This type of sampling is called sequential sampling.

What happens to the standard deviation of the sample mean, if we change the sample size from 25 to 100?

If all members of the population have identical opinions on an issue, a sample of one is unsatisfactory.

The standard error of the mean is the same as the a) standard deviation of the population b) standard deviation of the normal distribution c) standard deviation of the sampling distribution d) none of the above

A Decision Making Perspective on Marketing Intelligence

Marketing Research in Practice

The Marketing Research Process

Research Design and Implementation

Secondary Sources of Marketing Data

Standardized Sources of Marketing Data

Marketing Research on the Internet

Information Collection: Qualitative and Observational Methods

Information From Respondents: Issues in Data Collection

Information From Respondents: Survey Methods

Attitude Measurement

Designing the Questionnaire

Experimentation

Sampling Fundamentals

Fundamentals of Data Analysis

Hypothesis Testing: Basic Concepts and Tests of Association

Hypothesis Testing: Means and Proportions

Correlation Analysis and Regression Analysis

Discriminant, Factor and Cluster Analysis

Multidimensional Scaling and Conjoint Analysis

Presenting the Results

Marketing-Mix Measures

Brand and Customer Metrics

New Age Strategies

Filters

Assume that is distributed normally with 11efcb9a_a811_8fc8_b057_bbe19516e4bb_TB7490_00 = 0, 11efcb9a_a811_8fc8_b057_bbe19516e4bb_TB7490_00² = 1.What is Pz = 1)?

The probability that X₁ will exceed 9 ounces is closest to