In your college campus, 30 of the students use tobacco in some form. In your statistics class of 40 students, the probability of finding at least 15 students who use tobacco is:
a. 0.3051.
b. 0.1949.
c. 0.8051.
d. 0.1515.
e. 0.3485.
Question 2
The average speed of cars passing a checkpoint is 60 miles per hour with a standard deviation of 8 miles per hour. Fifty (50) passing cars are clocked at random from this checkpoint. The probability that the sample mean will be between 57 and 62 miles per hour is:
a. 0.9576.
b. 0.9960.
c. 0.2467.
d. 0.3520.
e. 0.4659
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