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Sampling Distributions Flashcards | StudBud
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Sampling Distributions
Sampling Distributions
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StudBud Administration
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Chapter 18 AP Stats
Flashcards
8 cards
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Practice quiz
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Questions
8
Answers
1
If a sample is normally distributed than the sample size..
sometimes matters
never matters
does not matter
always matters
2
A statistic is
unbiased
if..
the statistic has variability
mean of sampling distribution = to sample value
mean of sampling distribution = to true parameter value
mean of sampling distribution NOT = to true parameter value
3
A parameter is a...
number that describes a sample
a random sample
number that describes the population
a mean
4
Large samples give.
large spread
larger spread than small samples
small spread
smaller spread than small samples
5
We usually want statistics with..
low bias and low variability
high bias and low variability
low bias and high variability
high bias and high variability
6
The Central Limit Theorem allows us to use normal probability to answer questions about..
sample proportions
standard deviations
sample means
sample distributions
7
How large would a sample have to be to cut the standard deviation in half?
5x as large
2x as large
4x as large
3x as large
8
If the conditions for np≥10 and n(p-1)≥10 are met..
the sample is not normal
the sample is approximately normal
the sample is skewed left
the sample is biased
