What formula is described by = √ΣX² P(X)] - H²? a. the mean of a discrete random variable b. the variance of a discrete random variable c. the standard deviation of a discrete random variable d. the expected value of a discrete random variable
What formula is described by = √ΣX² P(X)] - H²? a. the mean of a discrete random variable b. the variance of a discrete random variable c. the standard deviation of a discrete random variable d. the expected value of a discrete random variable
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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Answer 8,9,10
![8. What formula is described by = √ΣX² P(X)]-H²?
a. the mean of a discrete random variable
b. the variance of a discrete random variable
c. the standard deviation of a discrete random variable
d. the expected value of a discrete random variable
For numbers 9-10, refer to the probability distribution of the number of books borrowed from a school library in a day and its corresponding
probabilities.
25
30
35
40
45
X 20
P(X) 0.1
0.1
0.4
0.2
0.1 0.1
9. What is the mean of the probability distribution?
b. 29
c. 30
d. 32
a. 25
10. How would you interpret the mean value that you get from item number 9?
a. It is the least number of books borrowed from the school library in a day.
b.
It is the largest number of books borrowed from the school library in a day.
c.
It is the average number of books borrowed from the school library in a day.
d. It is the difference between the largest and the least number of books borrowed from the school library in a day.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F25fb3b81-3b2a-404d-9c0b-d752c63bb45a%2Ffb136406-f030-41be-a3b4-4bab8e1a6ab0%2Fnm702k8_processed.jpeg&w=3840&q=75)
Transcribed Image Text:8. What formula is described by = √ΣX² P(X)]-H²?
a. the mean of a discrete random variable
b. the variance of a discrete random variable
c. the standard deviation of a discrete random variable
d. the expected value of a discrete random variable
For numbers 9-10, refer to the probability distribution of the number of books borrowed from a school library in a day and its corresponding
probabilities.
25
30
35
40
45
X 20
P(X) 0.1
0.1
0.4
0.2
0.1 0.1
9. What is the mean of the probability distribution?
b. 29
c. 30
d. 32
a. 25
10. How would you interpret the mean value that you get from item number 9?
a. It is the least number of books borrowed from the school library in a day.
b.
It is the largest number of books borrowed from the school library in a day.
c.
It is the average number of books borrowed from the school library in a day.
d. It is the difference between the largest and the least number of books borrowed from the school library in a day.
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