You simply do 6x5x4x3x2x1 :)
55/44. or simplified to be 5/4.
Hope this helps!
The <em><u>correct answer</u></em> is:
1.5% of the scores, or 3 people.
Explanation:
A z-score tells the number of standard deviations a data point is from the mean. Since Bob's score is 2.17 standard deviations above the mean, that means his z-score is 2.17.
Using a z-table, we find the probability that a score would be to the left of, or less than, this value. In the table, this is 0.9850. However, we are interested in the number of people that scored <em>higher</em> than Bob. This means we subtract this from 1:
1-0.9850 = 0.015.
This is the percentage of people that scored higher than Bob. To convert to a percent, multiply by 100:
0.015*100 = 1.5.
To find the number of people that scored higher than Bob, take 1.5% of 200:
0.015(200) = 3.
