All else being equal, the higher the confidence level, the wider the confidence interval.
1.True
2.False
Q. 2The sampling distribution of p tends to be more spread out for larger sample sizes than for smaller sample sizes.
1.True
2.False
Q. 3A statistic that is unbiased with a small standard error is likely to result in an estimate that is close to the actual value of the population characteristic.
1.True
2.False
Q. 4Using an unbiased statistic guarantees that there will be no systematic tendency to under- or overestimate the value of the population characteristic and that estimates will almost always be relatively close to the true value.
1.True
2.False
Q. 5A particular test is often used for measuring depression in adults. Scores range from 0 to 50 with higher scores indicating greater depression. Let X represent the score on this test for healthy young adults. Such scores have a normal distribution with a mean of 20 and a standard deviation of 6. This test is administered to a random sample
of 4 healthy young adults.
What is the shape of the sampling
distribution of the sample mean
score for the 4 healthy young adults?
1.normal
2.t distribution with 3 degrees of freedom
3.uniform over the range of 0 to 50
Q. 6A particular test is often used for measuring depression in adults. Scores range from 0 to 50 with higher scores indicating greater depression. Let X represent the score on this test for healthy young adults. Such scores have a normal distribution with a mean of 20 and a standard deviation of 6. This test is
administered to a random sample
of 4 healthy young adults.
What is the standard deviation
of the sampling distribution of
the sample mean score for the
4 healthy young adults?
1.6
2.1.5
3.3
Q. 7A particular test is often used for measuring depression in adults. Scores range from 0 to 50 with higher scores indicating greater depression. Let X represent the score on this test for healthy young adults. Such scores have a normal distribution with a mean of 20 and a standard deviation of 6. This test is
administered to a random sample
of 4 healthy young adults.
What is the mean of the
sampling distribution of the
sample mean score for the
4 healthy young adults?
1.20
2.20/4 = 5
3.25
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