3. The random variable x represents the number of cars per household in a town of 1000 households. Find the probability of randomly selecting a household that has less than two cars. Cars|Households 125 1 428 256 3 108 4 83 A) 0.809 B) 0.125 C) 0.428 D) 0.553 4 The random variable x represents the number of credit cards that adults have along with the corresponding probabilities. Find the mean and standard deviation. x P(x) 0| 0.07 1 0.68 2 0.21 3 0.03 4 0.01 A) mean: 1.23; standard deviation: 0.44 C) mean: 1.30; standard deviation: 0.44 B) mean: 1.30; standard deviation: 0.32 D) mean: 1.23; standard deviation: 0.66
3. The random variable x represents the number of cars per household in a town of 1000 households. Find the probability of randomly selecting a household that has less than two cars. Cars|Households 125 1 428 256 3 108 4 83 A) 0.809 B) 0.125 C) 0.428 D) 0.553 4 The random variable x represents the number of credit cards that adults have along with the corresponding probabilities. Find the mean and standard deviation. x P(x) 0| 0.07 1 0.68 2 0.21 3 0.03 4 0.01 A) mean: 1.23; standard deviation: 0.44 C) mean: 1.30; standard deviation: 0.44 B) mean: 1.30; standard deviation: 0.32 D) mean: 1.23; standard deviation: 0.66
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:D) Contimuous
State whether the variable is discrete or continuous.
The cost of a Statistics textbook
A) discrete
B) continuous
3. The random variable x represents the number of cars per household in a town of 1000 households.
Find the probability of randomly selecting a household that has less than two cars.
Cars|Households
125
1
428
2
256
108
4
83
A) 0.809
B) 0.125
C) 0.428
D) 0.553
4 The random variable x represents the number of credit cards that adults have along with the
corresponding probabilities. Find the mean and standard deviation.
x P(x)
0| 0.07
1
0.68
2 0.21
3 0.03
4 0.01
A) mean: 1.23; standard deviation: 0.44
C) mean: 1.30; standard deviation: 0.44
B) mean: 1.30; standard deviation: 0.32
D) mean: 1.23; standard deviation: 0.66
S A test consists of 90 multiple choice questions, each with five possible answers, only one of which
is correct. Find the mean and the
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