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BMAL 590 Quantitative Research Techniques and Statistics with Complete SolutionsBMAL 590 Quantitative Research Techniques and Statistics with Complete SolutionsBMAL 590 Quantitative Research Techniques and Statistics with Complete SolutionsA company has developed a new computer sound card whose ave...

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BMAL 590 Quantitative Research
Techniques and Statistics with Complete
Solutions
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

Initial estimates of the probabilities of events are known as - ANSWER-Prior
probabilities

The standard deviation of the sampling distribution of x̄ is also called the - ANSWER-
Standard error of the sample mean

The Central Limit Theorem states that, if a random sample of size n is drawn from a
population, then the sampling distribution of the sample mean - ANSWER-Is
approximately normal if n > 30

If all possible samples of size n are drawn from a population, the probability distribution
of the sample mean x̄ is called - ANSWER-The sampling distribution of x̄

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
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