Answer to Question 1
A parameter is a characteristic of a population; a statistic is a characteristic of a sample. An example of a parameter would be the proportion of all students who will vote for a particular candidate for student body president. An example of a statistic is the proportion of students in a sample who will vote for the candidate.
Answer to Question 2
By the empirical rule we could say 16 will be above 70 points. Thus a score of 70 points corresponds to the 84th percentile. Using a table or calculator to obtain the exact area to the left of a z = 1, we could report Greg's score as the 84.13th percentile.
Difference between Asian (left) and African (right) elephant ears.
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