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Stats Exam 1
Question | Answer |
---|---|
What is a statistic | Summarized value of a sample |
what is a sample | subset of a population |
what is a paramater | summarized value of population |
what is statistics | study of variation |
what type of data do we deal with | continous, raw, normal, interval |
what is central tendency | single score used to represent all the scores |
what is variability | scatter or spread of scores |
what is deviation | how far the raw score from the mean is |
what is variation | sum of square deviations from mean |
what is variance | mean squared |
formula for standard deviation | square root of MS |
formula for Variance | MS or Ssquared. SS/(n-1) |
Formula for variation | SS= Sum of (Y2) - (Sum Y)2/n |
Sum of scores | Sigma Y |
Sum of squared scores | Sigma (Y2) |
Sum of scores squared | (Sigma Y) 2 |
sum of squares |