Given the following table of grades: Grades A B C D F Totals Males 17 8...

Given the following table of grades:

Grades	A	B	C	D	F	Totals
Males	17	8	14	11	3	53
Females	12	11	13	6	5	47
Totals	29	19	27	17	8	100

a. What is the probability that a randomly selected student got an A or B?

b. What is the probability that if a student was female that they got a passing grade?

c. What is the probability of a female student given that they got a “B”?

4. The Edward’s Theater chain has studied its movie customers to determine how much money they spend on concessions. The study revealed that the spending distribution is approximately normally distributed with a mean of $4.11 and a standard deviation of $1.37. What percentage of customers will spend less than $3.00 on concessions? Use the Z-tables in the textbook.

Expert Solution

orchestra answered 3 years ago

1.A college professor claims his student grades are distributed as follows: A: 17%; B: 29%; C: 38%; D: 11%; F:...

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