QMB 2100 (Practice Test #3) Questions
With Correct Answers
We can expect some difference between sample statistics and the corresponding
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population parameters. This difference is called the sampling error. - CORRECT
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ANSWER✔✔-TRUE
For the sampling distribution of sample means, standard error will decrease as
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sample size increases. - CORRECT ANSWER✔✔-TRUE
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The central limit theorem states that if the sample size, n, is sufficiently large, the
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sampling distribution of the means will be approximately normal, even when the
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population is skewed or uniform. - CORRECT ANSWER✔✔-TRUE
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The standard error of the mean is also called the sampling error. - CORRECT
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ANSWER✔✔-FALSE
A point estimate is a single value used to estimate a population parameter. -
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CORRECT ANSWER✔✔-FALSE
|
When using the t-distribution to calculate a confidence interval, we assume that
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the population of interest is normal or nearly normal. - CORRECT ANSWER✔✔-
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TRUE
, A point estimate is a range of values used to estimate a population parameter. -
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CORRECT ANSWER✔✔-FALSE |
Hypothesis testing is a procedure that uses sample evidence and probability
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theory to decide whether to reject or fail to reject a hypothesis. - CORRECT
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ANSWER✔✔-TRUE
The Greek letter used to represent the probability of a Type I error is alpha (α). -
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CORRECT ANSWER✔✔-TRUE |
The level of significance is the probability of rejecting the null hypothesis when it
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is actually true. - CORRECT ANSWER✔✔-TRUE
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When all the items in a population have an equal chance of being selected for a
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sample, the process is called _________________. - CORRECT ANSWER✔✔-
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simple random sampling
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To study the population of consumer perceptions of new technology, sampling of
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the population is preferred over surveying the population because _________. -
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CORRECT ANSWER✔✔-it is quicker | | |
Which of the following is the standard error of the mean? - CORRECT
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ANSWER✔✔-σ/√n
Manufacturers were subdivided into groups by volume of sales. Those with more
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than $100 million in sales were classified as large; those from $50 to $100 million
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as medium size; and those between $25 and $50 million, and so on. Samples
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With Correct Answers
We can expect some difference between sample statistics and the corresponding
| | | | | | | | | | |
population parameters. This difference is called the sampling error. - CORRECT
| | | | | | | | | | |
ANSWER✔✔-TRUE
For the sampling distribution of sample means, standard error will decrease as
| | | | | | | | | | | |
sample size increases. - CORRECT ANSWER✔✔-TRUE
| | | | |
The central limit theorem states that if the sample size, n, is sufficiently large, the
| | | | | | | | | | | | | | |
sampling distribution of the means will be approximately normal, even when the
| | | | | | | | | | | |
population is skewed or uniform. - CORRECT ANSWER✔✔-TRUE
| | | | | | |
The standard error of the mean is also called the sampling error. - CORRECT
| | | | | | | | | | | | | |
ANSWER✔✔-FALSE
A point estimate is a single value used to estimate a population parameter. -
| | | | | | | | | | | | | |
CORRECT ANSWER✔✔-FALSE
|
When using the t-distribution to calculate a confidence interval, we assume that
| | | | | | | | | | | |
the population of interest is normal or nearly normal. - CORRECT ANSWER✔✔-
| | | | | | | | | | |
TRUE
, A point estimate is a range of values used to estimate a population parameter. -
| | | | | | | | | | | | | | |
CORRECT ANSWER✔✔-FALSE |
Hypothesis testing is a procedure that uses sample evidence and probability
| | | | | | | | | | |
theory to decide whether to reject or fail to reject a hypothesis. - CORRECT
| | | | | | | | | | | | | |
ANSWER✔✔-TRUE
The Greek letter used to represent the probability of a Type I error is alpha (α). -
| | | | | | | | | | | | | | | | |
CORRECT ANSWER✔✔-TRUE |
The level of significance is the probability of rejecting the null hypothesis when it
| | | | | | | | | | | | | |
is actually true. - CORRECT ANSWER✔✔-TRUE
| | | | |
When all the items in a population have an equal chance of being selected for a
| | | | | | | | | | | | | | | |
sample, the process is called _________________. - CORRECT ANSWER✔✔-
| | | | | | | |
simple random sampling
| |
To study the population of consumer perceptions of new technology, sampling of
| | | | | | | | | | | |
the population is preferred over surveying the population because _________. -
| | | | | | | | | | |
CORRECT ANSWER✔✔-it is quicker | | |
Which of the following is the standard error of the mean? - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-σ/√n
Manufacturers were subdivided into groups by volume of sales. Those with more
| | | | | | | | | | | |
than $100 million in sales were classified as large; those from $50 to $100 million
| | | | | | | | | | | | | | |
as medium size; and those between $25 and $50 million, and so on. Samples
| | | | | | | | | | | | | |
