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BESC 3010 Exam 2 with correct Answers (Graded A)
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BESC 3010 Exam 2 with correct Answers
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BESC 3010 Exam 2 with correct AnswersOne reason that researchers nearly always gather data from samples of participants
instead of entire populations is because.. - Answer -it can be impractical or even
impossible to study populations.
According to the Central Limit Theorem, the mean of the sampling distribution of means
- \mu_{\overline{X}}
μ
X
¯
- will equal... - Answer -the mean of the original population.
If a test has a population mean of 70 and standard deviation of 6, then what is the z-
score for a sample of n = 9 scores with a mean of 76? - Answer -3
The central limit theorem says that when all possible samples of a sufficient size are
taken from a population and their means are charted, that distribution of means will be...
- Answer -normally distributed.
The distribution of all possible samples of a given size (e.g., n = 54 or n = 117) are
taken from a population and their means are charted, that distribution is known as... -
Answer -the sampling distribution of means.
The Central Limit Theorem states that the shape of a sampling distribution becomes
closer to what shape as the number of sample means in the distribution increases? -
Answer -Normal
If the population mean for a distribution is 150 and the standard deviation is 20, then
what is the z-score for a sample of 100 people with an average score of 153? - Answer -
1.5
If a person were to create a sampling distribution for sample standard deviations, then
the mean of that distribution would be equal to... - Answer -the standard deviation of the
original distribution.
The equation for the standard error of a sampling distribution is... - Answer -
If a population has a mean of 40 and a standard deviation of 8, what would the z-score
be for a sample of 16 people with a mean of 46? - Answer -3
, A sampling distribution can be calculated for... - Answer -any sample statistic.
What is the standard error of a distribution if \sigma
σ
= 20 and n = 25? - Answer -4
If a population has a mean of 60 and a standard deviation of 15, what is the z-score for
a sample of 9 people with an average of 55? - Answer --1
What is the symbol for the standard error? - Answer -
As the size of samples (n) in a sampling distribution increases, the shape of that
distribution becomes more... - Answer -normal
What does the symbol \mu_{\overline X}
μ
X
¯
refer to? - Answer -The mean of the sampling distribution of means
What is the z-score for a sample with n = 100 and M = 103 if the population parameters
are \mu
μ
=100 and \sigma
σ
=10? - Answer -+3
What is the standard error for a distribution with \sigma
σ
= 40 when n = 4? - Answer -20
If a distribution of raw scores has a strong positive skew, then, given a sufficiently large
n, the mean of the sampling distribution will be equal to the _____ of the raw score
distribution. - Answer -mean
One reason that researchers nearly always gather data from samples of participants
instead of populations is because.. - Answer -it is easier to gather data from samples
than populations.
According to the Central Limit Theorem, if a research takes sufficiently large samples
(e.g., n > 30) from a bimodal distribution, then the resulting sampling distribution will
be... - Answer -unimodal
The distribution of all possible sample variances (of a given sample size) is called... -
Answer -the sampling distribution of variances.
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