Page 1
Betsy Crowfoot (username: 5954019)
Attempt 1
Written: Mar 26, 2022 9:46 PM - Mar 26, 2022 10:23 PM
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Approximately 8% of all people have blue eyes. A random
sample of 20 people is selected, find μ. Round to one decimal
place. Answer:
___1.6
___
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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 diploma? (That is, what is P(X < 6) (round to 4 decimal
places) Answer:
___.8555
___


Page 2
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An unprepared student takes a 10 question TRUE/FALSE quiz
and ended up guessing on all the problems. Find σ. Round
answer to 4 decimal places. Answer:
___1.5811
___
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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 places. Answer:
___0.9995
___


Page 3
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If random variable X has a binomial distribution with n =7 and
P(success) = p =0.6, find the probability that X is at least 6.
(That is, find P(X ≥ 6) (round to 4 decimal places) Answer:
___0.1586
___
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The table of data obtained from WWW.BASEBALL-ALMANAC.COM shows hit
information for four well known baseball players. Suppose that one hit from the table is
randomly selected.


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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 Babe Ruth|The hit was a Triple).
0.233
0.009
0.066
.767
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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:


Page 5
30
25
15
10
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A raffle sells 1000 tickets for $35 each to win a new car. What
is the probability of winning the car? Round to three decimal
places. Answer:
___0.001
___


Page 6
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In a box there are 4 red cards and 7 blue cards. The cards are
well-shuffled. If you pick a card without looking at the box,
what is the probability that you pick a blue card? (round to 3
decimal places) Answer:
___0.636
___
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Does the following table represent a valid discrete probability distribution?
x
1
2
3
4
5


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