Suppose that a hat contains slips of papers containing the numbers 1, 2 and 3. Two slips of paper are drawn, as in a) and b). Estimate the expected value and standard deviation of the product of the numbers on the slips of paper. a) Two slips of paper are drawn with replacement.
Suppose that a hat contains slips of papers containing the numbers 1, 2 and 3. Two slips of paper are drawn, as in a) and b). Estimate the expected value and standard deviation of the product of the numbers on the slips of paper. a) Two slips of paper are drawn with replacement.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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![Question 1
Suppose that a hat contains slips of papers containing the numbers 1, 2 and 3. Two slips of paper are drawn,
as in a) and b). Estimate the expected value and standard deviation of the product of the numbers on the
slips of paper.
a) Two slips of paper are drawn with replacement.
Answer:
в «- 1000
x <- replicate (B,
prod (sample(c(1,2,3), 2, replace
TRUE))
head (x)
## [1] 4 6 3 3 2 3
mean (x)
## [1] 4.076
sd(x)
## [1] 2.483222
b) Two slips of paper are drawn without replacement.
Answer:
в «- 1000
x <- replicate (B,
prod (sample (c(1,2,3), 2, replace = FALSE))
head (x)
## [1] 3 6 6 6 3 2
mean (x)
## [1] 3.655](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcb9da028-c1e8-4fb4-9df2-7f4287e8030e%2F70c3b104-d6b8-419e-8131-835716fb6996%2Fepbr9ry_processed.png&w=3840&q=75)
Transcribed Image Text:Question 1
Suppose that a hat contains slips of papers containing the numbers 1, 2 and 3. Two slips of paper are drawn,
as in a) and b). Estimate the expected value and standard deviation of the product of the numbers on the
slips of paper.
a) Two slips of paper are drawn with replacement.
Answer:
в «- 1000
x <- replicate (B,
prod (sample(c(1,2,3), 2, replace
TRUE))
head (x)
## [1] 4 6 3 3 2 3
mean (x)
## [1] 4.076
sd(x)
## [1] 2.483222
b) Two slips of paper are drawn without replacement.
Answer:
в «- 1000
x <- replicate (B,
prod (sample (c(1,2,3), 2, replace = FALSE))
head (x)
## [1] 3 6 6 6 3 2
mean (x)
## [1] 3.655
![sd (x)
## [1] 1.689624
c) Why is the expected value and standard deviation smaller when sampling without replacement?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcb9da028-c1e8-4fb4-9df2-7f4287e8030e%2F70c3b104-d6b8-419e-8131-835716fb6996%2Flthenah_processed.png&w=3840&q=75)
Transcribed Image Text:sd (x)
## [1] 1.689624
c) Why is the expected value and standard deviation smaller when sampling without replacement?
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