Across
- 2. a method used to test whether the unknown population means of two groups are equal or not
- 3. the use of sample data to calculate a single value which is to serve as a "best guess" or "best estimate" of an unknown population parameter
- 6. the actual mean of the whole population
- 8. used when the sample size is small and population standard deviation is unknown
- 10. the number of standard deviations by which a value is above or below the mean value
- 13. the value of the test statistic which defines the upper and lower bounds of a confidence interval
- 14. dealing with a single proportion
- 15. the number of subjects included in a sample
- 16. a range of estimates for an unknown parameter
Down
- 1. is the extent to which a distribution is stretched or squeezed
- 4. a range of values so defined that there is a specified probability that the value of a parameter lies within it
- 5. a statistic expressing the amount of random sampling error in the results of a survey
- 7. compare the means of two samples to see if it is feasible that they come from the same population
- 9. a probability distribution that is symmetric about the mean
- 11. dealing with two proportions
- 12. the average value of a sample of numbers taken from a larger population of numbers