# Standard Deviation

17. James  Bond, Registrar for  the University studied  the number  of rage  incidents  by  students  on  campus.  The  registrar  discovered  that  the distribution is approximately normal with a mean of 19 per semester  and a standard deviation of 7   (12 pts)

a. What is the probability of 15 or more rage incidents  per semester?     _

b. What is the probability of 3 or less rage incidents per semester?    _

c. What is the probability of 23 or more rage incidents per semester?    _

d. What is the probability of getting between 7 and 11 rage incidents  per semester?

e. What is the probability of getting between 13 and 41 rage incidents  per semester?

f. What is the probability of 19 or more rage incidents per semester?

18. The minimum  daily  temperatures for  the last seven years  on February 25  at

North Pole, Alaska were as follows:  (4 pts)

-3, 22, 15, 7, -17,-6  and 11

Find the “Range”  _

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