BUAL 2650 EXAM 1 HW(RATED A+)
The sampling distribution of the sample mean _x is the probability distribution of a
population. Describe this population. - ANSWERThe probability distribution of the
population of all possible samples means that could be obtained from all possible
samples of the same size.
If we do not reject H0 when it is false - ANSWERType II error
Denote the probability of a Type II error - ANSWERβ
The point on the horizontal axis under the standard normal curve that gives a right-
hand tail area equal to α - ANSWERCritical value
The probability, computed assuming that the null hypothesis H0 is true, of observing
a value of the test statistic that is at least as contradictory to H0 and supportive of Ha
as the value computed from the sample data - ANSWERP-value
What does the Central Limit Theorem tell us about the sampling distribution of the
sample mean? - ANSWERIf the sample size n is sufficiently large, then the
population of all possible sample means is approximately nor-mally distributed
Explain what is meant by the margin of error for a confidence interval. What error are
we talking about in the context of an interval for μ? - ANSWERA margin of error tells
you how many percentage points your results will differ from the real population
value
If we reject H0 when it is true - ANSWERType I error
Denote the probability of a Type I error - ANSWERα
The sampling distribution of the sample mean _x is the probability distribution of a
population. Describe this population. - ANSWERThe probability distribution of the
population of all possible samples means that could be obtained from all possible
samples of the same size.
If we do not reject H0 when it is false - ANSWERType II error
Denote the probability of a Type II error - ANSWERβ
The point on the horizontal axis under the standard normal curve that gives a right-
hand tail area equal to α - ANSWERCritical value
The probability, computed assuming that the null hypothesis H0 is true, of observing
a value of the test statistic that is at least as contradictory to H0 and supportive of Ha
as the value computed from the sample data - ANSWERP-value
What does the Central Limit Theorem tell us about the sampling distribution of the
sample mean? - ANSWERIf the sample size n is sufficiently large, then the
population of all possible sample means is approximately nor-mally distributed
Explain what is meant by the margin of error for a confidence interval. What error are
we talking about in the context of an interval for μ? - ANSWERA margin of error tells
you how many percentage points your results will differ from the real population
value
If we reject H0 when it is true - ANSWERType I error
Denote the probability of a Type I error - ANSWERα
