One measure of knowledge of a language is the size of someone's vocabulary. Certain digital language learning platforms focus heavily on building vocabulary. Suppose we consider two such learning platforms, Platform 1 and Platform 2, and compare their ability to improve vocabulary. Platform 1 markets itself as the best program for learning vocabulary, whereas Platform 2 markets itself as more a rounded program for learning language. Random samples of user data were taken from the two platforms. The data are summarized below where vocabulary size is measured in total words known. n Platform 1 20 Platform 2 28 x-bar 2800 2200 S 600 560 Construct a 99% confidence interval for the difference 1 - 1₂.
One measure of knowledge of a language is the size of someone's vocabulary. Certain digital language learning platforms focus heavily on building vocabulary. Suppose we consider two such learning platforms, Platform 1 and Platform 2, and compare their ability to improve vocabulary. Platform 1 markets itself as the best program for learning vocabulary, whereas Platform 2 markets itself as more a rounded program for learning language. Random samples of user data were taken from the two platforms. The data are summarized below where vocabulary size is measured in total words known. n Platform 1 20 Platform 2 28 x-bar 2800 2200 S 600 560 Construct a 99% confidence interval for the difference 1 - 1₂.
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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![One measure of knowledge of a language is the size
of someone's vocabulary. Certain digital language
learning platforms focus heavily on building
vocabulary. Suppose we consider two such learning
platforms, Platform 1 and Platform 2, and compare
their ability to improve vocabulary. Platform 1
markets itself as the best program for learning
vocabulary, whereas Platform 2 markets itself as
more a rounded program for learning language.
Random samples of user data were taken from the
two platforms. The data are summarized below
where vocabulary size x is measured in total words
known.
n
Platform 1 20
Platform 2 28
x-bar
2800
2200
S
600
560
Construct a 99% confidence interval for the
difference 1 - μ2.
\(600 \pm 488.888\)
\(2200 \pm 488.888\)
-600 170.88
2800 170.88](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F69a9a7af-4c76-4b8b-8c34-d0769bac279d%2F328c78fa-8ec2-4da4-bfdf-32ea7e208f8c%2Fy8jt8p_processed.jpeg&w=3840&q=75)
Transcribed Image Text:One measure of knowledge of a language is the size
of someone's vocabulary. Certain digital language
learning platforms focus heavily on building
vocabulary. Suppose we consider two such learning
platforms, Platform 1 and Platform 2, and compare
their ability to improve vocabulary. Platform 1
markets itself as the best program for learning
vocabulary, whereas Platform 2 markets itself as
more a rounded program for learning language.
Random samples of user data were taken from the
two platforms. The data are summarized below
where vocabulary size x is measured in total words
known.
n
Platform 1 20
Platform 2 28
x-bar
2800
2200
S
600
560
Construct a 99% confidence interval for the
difference 1 - μ2.
\(600 \pm 488.888\)
\(2200 \pm 488.888\)
-600 170.88
2800 170.88
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