Confidence Interval Puzzle

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