Term

Definition
In ______ sampling, every member of a population is given an equal chance of being selected for the sample.
A. Proportionate B. Nonrandom C. Probability D. Random 


Term

Definition
The inevitable difference between the mean of a sample and the mean of a population based on chance alone is a ______.
A. Random Sample B. Confidence Interval C. Sampling Error D. Probability 


Term
C. Sampling Distribution of Means 

Definition
A frequency distribution of a random sample of means is a ______.
A. Random Sample B. Confidence Interval C. Sampling Distribution of Means D. Standard Error of the Mean 


Term
D. Because of sampling error 

Definition
Why does a sampling distribution of means take the shape of the normal curve?
A. Because of skewness B. Because of probablity C. Because of confidence interval D. Because of sampling error 


Term
A. in the tails of the distribution. 

Definition
Alpha represents the area _____.
A. in the tails of a distribution
B. toward the center of the distribution.
C. higher than the mean of the distribution.
D. lower than the mean of the distribution. 


Term
Standard error of proportion
(95%) = P ± 1.96 * {sqrt[ p * (1  p)/n ]}
(99%) = P ± 2.58 * {sqrt[ p * (1  p)/n ]} 

Definition
The formulas for standard error of proportion is _____. 


Term

Definition
What is the forumula for the mean? 

