Bmal 590 Week 5 Exam Questions Correct Solutions New Update
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Course
Bmal 590
Institution
Bmal 590
Bmal 590 Week 5 Exam Questions Correct Solutions New Update
inferential statistics - Answers - You take a random sample of 100 students at your university and find that their average GPA is 3.. If you use this information to help you estimate the average GPA for all students at your University t...
Bmal 590 Week 5 Exam Questions
Correct Solutions New Update
inferential statistics - Answers -✔✔ You take a random sample of 100 students at your
university and find that their average GPA is 3.. If you use this information to help you
estimate the average GPA for all students at your University then you are doing what
branch of Statistics?
Sample - Answers -✔✔ A company has developed a new computer sound card whose
average lifetime is unknown, 200 sound cards are randomly selected from a large
production line and tested; their average lifetime is found to be 5 years. The 200 sounds
cards represent a
Statistic - Answers -✔✔ A company has developed a new computer sound card whose
average lifetime is unknown. In order to estimate the average, 200 sound cards are
randomly selected from a large production line and tested ; their average lifetime is
found to be 5 years. The 5 years represents a
Parameter - Answers -✔✔ A summary measure that is computed from a population is
called a
A significance level - Answers -✔✔ Which of the following is a measure of the reliability
of a statistical inference?
doing inferential statistics. - Answers -✔✔ The Process of using sample statistics to
draw conclusions about population parameters is called
All registered voters in the state of Michigan - Answers -✔✔ Which of the following
represents a population, as opposed to a sample?
the 500 adult pine trees selected at random selected at random from this forest. -
Answers -✔✔ A study in underway to determine the average height of all 32000 adult
pines trees in a certain national forest. The heights of 500 randomly selected adult pine
tree are measured and analyzed. The sample this study is
the proportion of times a conclusion about a population will be wrong in the long run -
Answers -✔✔ The significance level of statistical inference measures
the proportion of times an estimation procedure will be correct in the long run - Answers
-✔✔ The confidence level of a statistical inference measures
, A survey - Answers -✔✔ 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 ?
All of these choices are true - Answers -✔✔ Which of the following statements is true
regarding the design of a good survey ?
Direct observation - Answers -✔✔ 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 ?
Sampling error - Answers -✔✔ The difference between a sample mean and the
population mean is called
Stratified random sample - Answers -✔✔ The manager of the customer service division
of a major consumer electronics company is interested in determine 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
Simple random sample - Answers -✔✔ When every possible sample with the same
number of observations is equally likely to be chosen, the result is called a
Self selected Samples - Answers -✔✔ Which of the following types of samples is
almost always biased?
all of these answers are correct - Answers -✔✔ Which of the following is an example of
a non sampling error
All of these answers are true - Answers -✔✔ Which of the following situations lends
itself to cluster samples ?
Taking a random sample from a population instead studying the entire population. -
Answers -✔✔ Which of the following causes a sampling error?
Some members of the target population are excluded from possible selection for the
sample. - Answers -✔✔ Which of the following describes selection bias ?
Classical approach - Answers -✔✔ An approach to assigning probabilities which
assumes that all outcomes of the experiment are equally likely is referred to as the
Sample space - Answers -✔✔ The collection of all possible outcomes of an experiment
is called
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