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AP Stats Ch 9 Sampling Distributions Flashcards | StudBud

Explore/AP Stats Ch 9 Sampling Distributions

AP Stats Ch 9 Sampling Distributions

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Chapter 9 AP Stats

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Questions 8

Answers

1
The Central Limit Theorem allows us to use normal probability to answer questions about..
standard deviations
sample proportions
sample distributions
sample means
2
We usually want statistics with..
high bias and high variability
low bias and low variability
low bias and high variability
high bias and low variability
3
If the conditions for np≥10 and n(p-1)≥10 are met..
the sample is skewed left
the sample is not normal
the sample is approximately normal
the sample is biased
4
A statistic is unbiased if..
mean of sampling distribution NOT = to true parameter value
the statistic has variability
mean of sampling distribution = to true parameter value
mean of sampling distribution = to sample value
5
A parameter is a...
a mean
number that describes the population
a random sample
number that describes a sample
6
How large would a sample have to be to cut the standard deviation in half?
5x as large
3x as large
4x as large
2x as large
7
The sample size does not matter if ..
the sample is normally distributed
you are looking at sample means
the population is normally distributed
you are looking at sample proportions
8
Large samples give.
small spread
smaller spread than small samples
larger spread than small samples
large spread