A. A __________ is a numerical descriptivemeasure of a sample. (a) parameter (b)
ID: 2916077 • Letter: A
Question
A. A __________ is a numerical descriptivemeasure of a sample.
(a) parameter (b) population
(c) statistic (d) statistical inference (e) probability samplingdistribution
B. A __________ is a subset of measurementsfrom the population.
(a) proportion (b) sample
(c) estimate (d) statistic (e) parameter
C. A __________ is a numerical descriptivemeasure of a population.
(a) parameter (b) central limit theorem
(c) statistic (d) statistical inference (e) probability samplingdistribution
D. A __________ can be thought of as a set ofmeasurements (or counts), either
existing or conceptual.
(a) population (b) statistic
(c) estimate (d) sample (e) parameter
According to the Empirical rule, for a distribution that issymmetrical and bell-shaped (in particular, for a normaldistribution) approximately _______ of the data values will liewithin one standard deviation on each side of the mean
_______According to the Empirical rule, for a distribution thatis symmetrical and bell-shaped (in particular, for a normaldistribution) approximately _______ of the data values will liewithin three standard deviations on each side of the mean. (1pt.)
______According to the Empirical rule, for a distribution thatis symmetrical and bell-shaped (in particular, for a normaldistribution) approximately _____ of the data values will liewithin two standard deviations on each side of the mean. (1pt.)
(A) 75 % (B) 95% (C) 68% (D) 88.9% (E) 99.7%
_________The delivery time for a package sent within the UnitedStates is normally distributed with mean of 4 days and standarddeviation of approximately 1 day. If 300 packages are being sent,how many packages will arrive in less than 3 days?
(1 pt.)(A) 8 (B) 96 (C) 102 (D) 198 (E) 48
Explanation / Answer
A. A statistic is a numericaldescriptive measure of a sample.
B. A sample is a subset of measurementsfrom the population.
C. A parameter is a numericaldescriptive measure of a population.
D. A population can be thought of as aset of measurements (or counts), either
existing or conceptual.
According to the Empirical rule, for a distribution that issymmetrical and bell-shaped (in particular, for a normaldistribution) approximately 68% of the data values will liewithin one standard deviation on each side of the mean
According to the Empirical rule, for a distribution that issymmetrical and bell-shaped (in particular, for a normaldistribution) approximately 99.7% of the data values willlie within three standard deviations on each side of the mean. (1pt.)
According to the Empirical rule, for a distribution that issymmetrical and bell-shaped (in particular, for a normaldistribution) approximately 95% of the data values will liewithin two standard deviations on each side of the mean. (1pt.)
The delivery time for a package sent within the United States isnormally distributed with mean of 4 days and standard deviation ofapproximately 1 day. If 300 packages are being sent, how manypackages will arrive in less than 3 days?
D. 198, because this is only 1 standard deviation below themean. The empirical rule calls for about 68%.
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