MATH221 Week 3 Homework- Latest Update 2025 (Solved Correctly)
Let x represent the number of cars in a parking lot. This would be considered what type of variable: - Answers Discrete
Let x represent the height of corn in Oklahoma. This would be considered what type of variable: - Answers Continuo...
Let x represent the number of cars in a parking lot. This would be considered what type of variable: -
Answers Discrete
Let x represent the height of corn in Oklahoma. This would be considered what type of variable: -
Answers Continuous
Consider the following table.
Age Group Frequency
18-29 9831
30-39 7845
40-49 6869
50-59 6323
60-69 5410
70 and over 5279
If you created the probability distribution for these data, what would be the probability of 40-49? -
Answers 16.5%
Consider the following table.
Weekly hours worked - Probability
1-30 (average=22) 0.08
31-40 (average=35) 0.41
41-50 (average=46) 0.47
51 and over (average=61) 0.04
Find the mean of this variable. - Answers 40.2
Consider the following table.
Defects in batch Probability
0 --- 0.05
1 --- 0.18
2 --- 0.29
, 3 --- 0.24
4 --- 0.13
5 --- 0.11
Find the variance of this variable. - Answers 1.83
Consider the following table.
Defects in batch - Probability
2 --- 0.18
3 --- 0.29
4 --- 0.18
5 --- 0.14
6 --- 0.11
7 --- 0.10
Given this probability distribution, what is the probability that there will be more than 5 defects in
batch? - Answers 0.21
It is known that 13% of all golfers play on the weekends. We select 25 golfers and count the number of
golfers who play on weekends. For this binomial problem, which of the following is true? - Answers The
value of p is 0.13.
A survey found that 39% of all gamers play video games on their smartphones. Ten frequent gamers are
randomly selected. The random variable represents the number of frequent games who play video
games on their smartphones. What is the value of n? - Answers 10
Forty-four percent of US adults have little confidence in their cars. You randomly select twelve US adults.
Find the probability that the number of US adults who have little confidence in their cars is (1) exactly six
and then find the probability that it is (2) more than 7. - Answers (1) 0.207 (2) 0.099
Seven baseballs are randomly selected from the production line to see if their stitching is straight. Over
time, the company has found that 89.4% of all their baseballs have straight stitching. If exactly five of the
seven have straight stitching, should the company stop the production line? - Answers No, the
probability of exactly five have straight stitching is not unusual
A supplier must create metal rods that are 2.1 inches width to fit into the next step of production. Can a
binomial experiment be used to determine the probability that the rods are too wide, too narrow, or
about right? - Answers No, as there are three possible outcomes, rather than two possible outcomes
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