BMAL 590 QUANTITATIVE RESEARCH
TECHNIQUES AND STATISTICS
WITH VERIFIED ANSWERS|GRADED A+ |
UPDATED VERSION
QUESTIONS AND ANSWERS
A company has developed a new computer sound card whose average lifetime is unknown.
In order to estimate this average, 200 sound cards are randomly selected from a large
production line and tested; their average lifetime is found to be 5 years. The five years
represents a. ANSWER -Statistics
A summary measure that is computed from a population is called a. ANSWER -Parameter
Which of the following is a measure of the reliability of a statistical inference?. ANSWER -
A significance level
The process of using sample statistics to draw conclusions about population parameters is
called. ANSWER -Doing inferential statistics
Which of the following represents a population, as opposed to a sample?. ANSWER -All
registered voters in the State of Michigan
A study in under way to determine the average height of all 32,000 adult pine trees in a
certain national forest. The heights of 500 randomly selected adult pine trees are measured
and analyzed. The sample in this study is. ANSWER -The 500 adult pine trees selected at
random selected at random from this forest
The significance level of a statistical inference measures. ANSWER -The proportion of
times a conclusion about a population will be wrong in the long run
, The confidence level of a statistical inference measures. ANSWER -The proportion of times
an estimation procedure will be correct in the long run
A marketing research firm selects a random sample of adults and asks them a list of
questions regarding their beverage preferences. What type of data collection is involved
here?. ANSWER -A survey
Which of the following statements is true regarding the design of a good survey?.
ANSWER -All of these choices are true
Which method of data collection is involved when a researcher counts and records the
number of students wearing backpacks on campus on a given day?. ANSWER -Direct
observation
The difference between a sample mean and the population mean is called. ANSWER -
Sampling error
The manager of the customer service division of a major consumer electronics company is
interested in determining whether the customers who have purchased a videocassette
recorder over the past 12 months are satisfied with their products. If there are four different
brands of videocassette recorders made by the company, the best sampling strategy would
be to use a. ANSWER -Stratified random sample
When every possible sample with the same number of observations is equally likely to be
chosen, the result is called a. ANSWER -Simple random sample
Which of the following types of samples is almost always biased?. ANSWER -Self-selected
samples
Which of the following is an example of a nonsampling error?. ANSWER -All of these
choices are true
Which of the following situations lends itself to cluster samples?. ANSWER -All of these
choices are true
TECHNIQUES AND STATISTICS
WITH VERIFIED ANSWERS|GRADED A+ |
UPDATED VERSION
QUESTIONS AND ANSWERS
A company has developed a new computer sound card whose average lifetime is unknown.
In order to estimate this average, 200 sound cards are randomly selected from a large
production line and tested; their average lifetime is found to be 5 years. The five years
represents a. ANSWER -Statistics
A summary measure that is computed from a population is called a. ANSWER -Parameter
Which of the following is a measure of the reliability of a statistical inference?. ANSWER -
A significance level
The process of using sample statistics to draw conclusions about population parameters is
called. ANSWER -Doing inferential statistics
Which of the following represents a population, as opposed to a sample?. ANSWER -All
registered voters in the State of Michigan
A study in under way to determine the average height of all 32,000 adult pine trees in a
certain national forest. The heights of 500 randomly selected adult pine trees are measured
and analyzed. The sample in this study is. ANSWER -The 500 adult pine trees selected at
random selected at random from this forest
The significance level of a statistical inference measures. ANSWER -The proportion of
times a conclusion about a population will be wrong in the long run
, The confidence level of a statistical inference measures. ANSWER -The proportion of times
an estimation procedure will be correct in the long run
A marketing research firm selects a random sample of adults and asks them a list of
questions regarding their beverage preferences. What type of data collection is involved
here?. ANSWER -A survey
Which of the following statements is true regarding the design of a good survey?.
ANSWER -All of these choices are true
Which method of data collection is involved when a researcher counts and records the
number of students wearing backpacks on campus on a given day?. ANSWER -Direct
observation
The difference between a sample mean and the population mean is called. ANSWER -
Sampling error
The manager of the customer service division of a major consumer electronics company is
interested in determining whether the customers who have purchased a videocassette
recorder over the past 12 months are satisfied with their products. If there are four different
brands of videocassette recorders made by the company, the best sampling strategy would
be to use a. ANSWER -Stratified random sample
When every possible sample with the same number of observations is equally likely to be
chosen, the result is called a. ANSWER -Simple random sample
Which of the following types of samples is almost always biased?. ANSWER -Self-selected
samples
Which of the following is an example of a nonsampling error?. ANSWER -All of these
choices are true
Which of the following situations lends itself to cluster samples?. ANSWER -All of these
choices are true
