Urgent help needed One measure of knowledge of a language is the sizeof someone's vocabulary. Certain digital languagelearning platforms focus heavily on buildingvocabulary. Suppose we consider two such learningplatforms, Platform 1 and Platform 2, and comparetheir ability to improve vocabulary. Platform 1markets itself as the best program for learningvocabulary, whereas Platform 2 markets itself asmore a rounded program for learning language.Random samples of user data were taken from thetwo platforms. The data are summarized belowwhere vocabulary size x is measured in total wordsknown.nPlatform 1 20Platform 2 28x-bar28002200S600560Construct a 99% confidence interval for thedifference 1 - μ2.\(600 \pm 488.888\)\(2200 \pm 488.888\)-600 170.882800 170.88

The following information has been given: n1=20 x¯1=2800 s1=600n2=28 x¯2=2200…

Answered: One measure of knowledge of a language…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 27PPS

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University students are increasingly taking class notes on a laptop rather than writing their notes by hand. Students argue that laptops are more efficient, but professors typically disagree. Which method is better for developing conceptual understanding? In an experiment, 109 university students all watched the same lecture. Half were randomly assigned to take notes on a laptop while the remaining students took notes by hand. Before taking a test to measure conceptual understanding of the lecture, researchers assigned half of each group to review their notes while the other half wasn’t given an opportunity to review. List the explanatory variables and the number of possible values for each variable. If the researchers used every possible combination to form the treatments, how many treatments were included in the experiment? 2. List two of the treatments. 3. Were the subjects (the students) “blind” to what treatment they received? 4.What is the response variable?
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