Test Review

skills i need to have--

1. Measures of central tendancy (mean, mode, median)
   - measures of spread/variability(range, standard deviation of a population)
   
   GROUPED(Frequency table..L1etc.) VS UNGROUPED DATA.(single list)
2. Normal Distributions / Z-Scores
   -ronblond, normalcdf..... etc.
   
   *Is it normal or not?
   68-95-99.7 rule... 3 sets of tallies.. look in notes.
   
   Areas under the curve vs scores based on areas under the curve..
   
   Standardized tests
   - z-score..
3. Bionomial Distributions
   -mean=n times p
   standard deviation = sq root n times p times q
   p = prob success
   q = prob not success
   
   - binompdf(# of trials, prob success, no of success)
   - binomcdf ' ' ' '
   
   pdf - " exactly "
   cdf - " at most "
4. Confidence Intervals
   Stat - tests - A : 1 propZInt
   
   x=mean
   n=n
   c-level = either 0.9, 0.95, 0.99
   
   *read the question, or it'll lose me marks.
   - either precentages
   - real numbers of .. "3 ice cream cones.. "
   (... times the decimal.. with the number of ice cream cones)

*What does it (the interval) mean?