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15
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What is a Parameter?
A value that divides a list of numbers into quarters
A numerical characteristic of a population
A value below which a given percentage of observations fall
A sample Statistic
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What is a Confidence Interval?
All of the above
95% confidence interval, means 95 out of 100 times
Provides a specified level of confidence for an estimate
Range of values likely to Include parameter of interest
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What does correlation between two variables mean?
The Extent to which 2 or more variable fluctuate together
Two variables that can take on the same value
A variable that is continuous
None of the answers
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15
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For comparing the means of two separate groups, which is the best test?
Regression
ANOVA
Chi-squared
Independent T-test
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What does a p-value represent in statistical tests?
The probability of the obtained results when null is true
A significance level
The variance in the sample population
The sample mean
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Since p (.04) < a (.05), p < Îą, do we accept or reject the null hypothesis?
We reject the null hypothesis
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True or False. When p > Îą, you should fail to reject the Null hypothesis.
True
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What is a cluster sample?
A sample from a non-normal distribution
Sampling technique where population is divided into clusters
A very large sample size
Samples from various populations
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True or False: A variable is a factor that is liable to vary or change?
True
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True or False: A Chi-square test assesses the differences between two categorical variables?
True
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