BMAL 590 Quantitative Research Techniques and
Statistics Exam 2023
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
Which of the following causes sampling error? - ANSWER Taking a random
sample from a population instead of studying the entire population
Which of the following describes selection bias? - ANSWER Some members of the
target population are excluded from possible selection for the sample
An approach of assigning probabilities which assumes that all outcomes of the
experiment are equally likely is referred to as the - ANSWER Classical approach
The collection of all possible outcomes of an experiment is called - ANSWER A
sample space
If event A and event B cannot occur at the same time, then A and B are said to be -
ANSWER Mutually exclusive
Which of the following best describes the concept of marginal probability? -
ANSWER It is a measure of the likelihood that a particular event will occur,
regardless of whether another event occurs
The intersection of events A and B is the event that occurs when - ANSWER Both
A and B occur
Statistics Exam 2023
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
Which of the following causes sampling error? - ANSWER Taking a random
sample from a population instead of studying the entire population
Which of the following describes selection bias? - ANSWER Some members of the
target population are excluded from possible selection for the sample
An approach of assigning probabilities which assumes that all outcomes of the
experiment are equally likely is referred to as the - ANSWER Classical approach
The collection of all possible outcomes of an experiment is called - ANSWER A
sample space
If event A and event B cannot occur at the same time, then A and B are said to be -
ANSWER Mutually exclusive
Which of the following best describes the concept of marginal probability? -
ANSWER It is a measure of the likelihood that a particular event will occur,
regardless of whether another event occurs
The intersection of events A and B is the event that occurs when - ANSWER Both
A and B occur
