Symbols and Distributions
This symbol identifies the sample variance.
What is s2?
This is the mean of a z-score distribution.
What is 0?
A probability value that is deduced from reason alone.
What is a priori probability?
This distribution is the normal distribution.
What is the z score distribution?
A sample consists of n = 25 scores. This many scores are used to calculate the range.
What is 25?
This term is used to identify the standard deviation of the distribution of sample means.
What is the standard error?
This is the standard deviation of a z-score distribution.
What is 1?
A probability value that is determined after collecting data.
What is a posteriori probability?
A large sample and a small standard deviation which produce this size of a standard error.
What is small?
The size of the range for a small standard deviation.
What is small?
This symbol identifies the population standard deviation.
What is lowercase sigma?
Each person has an equal chance of being selected for the research study.
What is a random sample?
The probability of selecting a male out of a class that consists of 10 males and 30 females if one student is randomly selected from the class.
What is 10/40?
The mean of the sampling distribution of the mean is equal to the mean of this distribution.
What is the null hypothesis population distribution?
This is the standard deviation after you transform all raw scores to z-scores.
What is 1?
For most distributions, this proportion of scores falls within +/- 1 standard deviation of the mean.
What is 70%?
These rules cannot apply unless there is random sampling.
What are the rules of probability?
The natural discrepancy, or amount of error, between a sample statistic and its corresponding population parameter.
What is sampling error?
DAILY DOUBLE!!!!!!
If the population is normal or if the sample size is greater than 30.
The variables needed to calculate standard error.
What are the standard deviation of the population and sample size?
Adding 20 points to every score changes the standard deviation by how much?
What is nothing?
The direct, unchanged scores which are a direct result of measurement.
What are raw scores?
All probabilities can be expressed as decimal values ranging from these two integers.
What are 0 and 1?
All the values the sample mean can take AND the probability of getting each mean value if sampling is random from the null hypothesis population.
What is the sampling distribution of the mean?
On an exam with M = 52, you have a score of X = 44. This size standard deviation would give you a high position in the class.
What is a large standard deviation?