TEST
Suppose a random variable, x, arises from a binomial experiment. If n = 25,
and p = 0.85, find the P(X ≥ 15) using Excel. Round answer to 4 decimal

It is known that 50% of adult workers have a high school diploma. If a random sample of 8
adult workers is selected, what is the probability that less than 6 of them have a high school

If random variable X has a binomial distribution with n=9 and P(success) =p= 0.4, find the

Feedback:
in Excel,

=SQRT(9*0.4*0.6)
Suppose a random variable, x, arises from a binomial experiment. If n = 14, and p = 0.13, find

The table of data obtained from shows hit information
for four well known baseball players. Suppose that one hit from the table is randomly selected.
NAME
Single
Double
Triple
Home Run
TOTAL HITS
Babe Ruth
1,517
506
136
714
2,873
Jackie Robinson
1,054
273
54
137
1,518
Ty Cobb
3,603
174
295
114
4,189
Hank Aaron
2,294
624
98
755
3,771
TOTALS
8,468
1,577
583
1,720
12,351
Find
P
(hit was made by Ty Cobb|The hit was a Home Run).
●
A.
114
●
B.
0.033
●
C.
0.066
●
D.
0.009
Answer Key:
C

Feedback:
Good job,
114/1720

How many ways can you choose 4 cookies from a cookie jar containing 25 cookies of all the
Feedback:
Order does not matter.
In Excel,
=COMBIN(25,4)
You have a club of fifteen people. You need to pick a president, treasurer, and secretary from
the fifteen. How many different ways can you do this? Leave answer as whole number, do not
include decimals or commas.
Answer:
455
Answer Key:
2730|2,730
Feedback:
Order matters.
In Excel,
=PERMUT(15,3)
You are going to a benefit dinner, and need to decide before the dinner what you want for salad,
main dish, and dessert. You have 2 different salads to choose from, 3 main dishes, and 5 desserts.
How many different meals are available? Answer:
●

Answer Key:
A
Feedback:
2*3*5