Prob & Stats Chapter 5

1. a method used to eliminate units.
4. When subtracting the mean of the data from every data value, the mean is shifted to _____.
7. standardizing the z-scores changes the _____ by making the mean 0.
8. a value calculated from data to summarize aspects of the data.
9. a distribution that is unimodal and symmetric.
12. one model that shows up over and over in statistics.
13. the Normal model with mean 0 and standard deviation 1.
15. a value found by subtracting the mean from that value and then dividing by the standard deviation.

2. a measurement corresponding to a z-score that gives the percentage of values in a standard Normal distribution found at that z-score or below.
3. a numerically valued attribute of a model.
5. standardizing the z-scores changes the _____ by making the standard deviation 1.
6. For _______ data, it’s not uncommon for at least half of the data to have z-scores between –1 and 1.
8. standardizing the z-scores does not change the _____ of the distribution of a variable.
10. a useful family of models for unimodal, symmetric distributions.
11. z-scores measure the distance of a value from the _____ in standard deviations.
14. a measurement that tells how many standard deviations a value is from the mean.