QUANTITATIVE RESEARCH
TECHNIQUES AND STATISTICS
WITH VERIFIED ANSWERS |
GRADED A+ | UPDATED VERSION
QUESTIONS AND ANSWERS
A company has developed a new smartphone whose average lifetime is unknown. In order
to estimate this average, 200 smartphones are randomly selected from a large production
line and tested; their average lifetime is found to be 5 years. The 200 smartphones
represent a __________. ANSWER -sample
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 statements involve descriptive statistics as opposed to inferential
statistics? ANSWER -The Alcohol, Tobacco and Firearms Department reported that
Houston had 1,791 registered gun dealers in 1997.
A population of all college applicants exists who have taken the SAT exam in the United
States in the last year. A parameter of the population are __________. ANSWER -SAT
scores
Which of the following statements is true regarding the design of a good survey?
ANSWER -The questions should be kept as short as possible
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 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
Which of the following types of samples is almost always biased? ANSWER -Self-selected
samples
_________ is an expected error based only on the observations limited to a sample taken
from a population. ANSWER -sampling error
Bayes's Law is used to compute __________. ANSWER -posterior probabilities
The classical approach describes a probability _________. ANSWER -in terms of the
proportion of times that an event can be theoretically expected to occur
If a set of events includes all the possible outcomes of an experiment, these events are
considered to be __________. ANSWER -exhaustive
Which of the following statements is not correct? ANSWER -If event A does not occur,
then its complement A' will also not occur.
The __________ can determine the union of two events such as event A and event B.
ANSWER -addition rule
The concept that allows us to draw conclusions about the population based strictly on
sample data without having any knowledge about the distribution of the underlying
population is ___________. ANSWER -the central limit theorem
Each of the following are characteristics of the sampling distribution of the mean except
___________. ANSWER -if the original population is not normally distributed, the
sampling distribution of the mean will also be approximately normal for large sample sizes
TECHNIQUES AND STATISTICS
WITH VERIFIED ANSWERS |
GRADED A+ | UPDATED VERSION
QUESTIONS AND ANSWERS
A company has developed a new smartphone whose average lifetime is unknown. In order
to estimate this average, 200 smartphones are randomly selected from a large production
line and tested; their average lifetime is found to be 5 years. The 200 smartphones
represent a __________. ANSWER -sample
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 statements involve descriptive statistics as opposed to inferential
statistics? ANSWER -The Alcohol, Tobacco and Firearms Department reported that
Houston had 1,791 registered gun dealers in 1997.
A population of all college applicants exists who have taken the SAT exam in the United
States in the last year. A parameter of the population are __________. ANSWER -SAT
scores
Which of the following statements is true regarding the design of a good survey?
ANSWER -The questions should be kept as short as possible
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 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
Which of the following types of samples is almost always biased? ANSWER -Self-selected
samples
_________ is an expected error based only on the observations limited to a sample taken
from a population. ANSWER -sampling error
Bayes's Law is used to compute __________. ANSWER -posterior probabilities
The classical approach describes a probability _________. ANSWER -in terms of the
proportion of times that an event can be theoretically expected to occur
If a set of events includes all the possible outcomes of an experiment, these events are
considered to be __________. ANSWER -exhaustive
Which of the following statements is not correct? ANSWER -If event A does not occur,
then its complement A' will also not occur.
The __________ can determine the union of two events such as event A and event B.
ANSWER -addition rule
The concept that allows us to draw conclusions about the population based strictly on
sample data without having any knowledge about the distribution of the underlying
population is ___________. ANSWER -the central limit theorem
Each of the following are characteristics of the sampling distribution of the mean except
___________. ANSWER -if the original population is not normally distributed, the
sampling distribution of the mean will also be approximately normal for large sample sizes
