The larger the population standard deviation, the larger the standard error of the mean will be.
Answer
Correct Answer:
True
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The larger the population standard deviation, the larger the standard error of the mean will be.
Answer
Correct Answer:
True
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The standard error is the sample variance divided by the square root of the sample size.
Answer
Correct Answer:
False
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If a researcher selects a sample of 36 participants from a population with a variance of 16, then the standard error of the mean will be 2.0.
Answer
Correct Answer:
False
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On average the sample mean will equal the population mean, and the sample mean is an unbiased estimator.
Answer
Correct Answer:
True
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A sampling distribution is a distribution of all population means or variances that could be obtained in samples of a given size from the same population.
Answer
Correct Answer:
False
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A researcher states that a sample of 100 babies from a rural area weighed 25 ± 7.5 (M ± SEM) pounds at their first birthday. Which value is the standard error of the mean?
Answer
Correct Answer:
7.5
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A sample of 25 participants where the population mean was 10 and standard deviation was 5 completed a word recall test. What is the probability of obtaining a sample mean that is at least two standard deviations larger than the population mean?
Answer
Correct Answer:
.0228
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A researcher decreases the sample size, which will:
Answer
Correct Answer:
Increase the value of standard error.
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A researcher decreases the sample size, which will:
Answer
Correct Answer:
Increase the value of standard error.
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The following samples were selected by two researchers. Which is associated with a smaller standard error of the mean? Researcher A: n = 36, u = 5, ϭ = 12; Researcher B: n = 36, u = 32, ϭ = 6.
Answer
Correct Answer:
Researcher B
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A researcher selects a sample of 49 participants from a population with a standard deviation of 7. What is the standard error of the mean?
Answer
Correct Answer:
Equal to 1
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A sample of 144 participants from a population with a mean of 100 and a variance of 36 completed a cognitive test. What is the standard error of the mean?
Answer
Correct Answer:
0.5
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According to the central limit theorem, as the number of samples in the sampling distribution increases, the sampling distribution of sample means selected at random from that population will:
Answer
Correct Answer:
Approach the shape of a normal distribution.
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The variance of the sampling distribution of sample means equals the ________ divided by the sample size.
Answer
Correct Answer:
Population variance
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The variance of the sampling distribution of sample means equals the ________ divided by the sample size.
Answer
Correct Answer:
Population variance
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Sampling strategy used in developing statistical theory is based on:
Answer
Correct Answer:
Participants being replaced after being sample
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The following are true for sampling without replacement, except:
Answer
Correct Answer:
It is used in the development of statistical theory.
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Unbiased Estimator is any sample statistic, such as a sample variance when we divide SS by_____, obtained from a randomly selected sample that equals the value of its respective population parameter, such as a population variance.
Answer
Correct Answer:
N-1
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The standard deviation of a sampling distribution of sample means is known as_____
Answer
Correct Answer:
Both a and b
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The standard deviation of a sampling distribution of sample means is known as_____
Answer
Correct Answer:
Both a and b
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Sampling Without Replacement is a method of sampling in which each participant or item selected is not replaced before the next selection.
Answer
Correct Answer:
True
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Sampling With Replacement is a method of sampling in which each participant or item selected is not replaced before the next selection.
Answer
Correct Answer:
False
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Sampling Error is the extent to which sample means selected from the same population _____ one another.
Answer
Correct Answer:
Differ
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Sample Distribution is a distribution of all _____ that could be obtained in samples of a given size from the same population.
Answer
Correct Answer:
Both a and b
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Sample Design is a specific plan or protocol for how individuals will be _____ from a population of interest.
Answer
Correct Answer:
Both band c
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Law Of Large Numbers states that increasing the number of observations or samples in a study will _____ the standard error.
Answer
Correct Answer:
Decrease
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Central Limit Theorem explains that regardless of the distribution of scores in a population, the sampling distribution of sample means selected at random from that population will approach the shape of a_____
Answer
Correct Answer:
Normal Distribution
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