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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 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
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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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
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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