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Problem 1. We considered Mary's interest in doing a study to see if learning of 6th graders on a math lesson is affected by background noise level. There, she was planning to use 2 noise conditions and then analyze her outcomes using a t-test for independent groups. Describe the study Mary might plan where she would use a one-way analysis of variance (ANOVA) for independent groups instead of a t-test to study differences between noise levels. What is her independent variable here? Describe the conditions she could create for this study. What is her dependent variable? Describe a way to measure the DV so that each participant would have one score at the end that would be on a continuous scale of measurement. Support your responses.
Problem 2.
Consider Mary's study of whether the learning of 6th graders on a math lesson is affected by background noise level. Describe the pros and cons of Mary using a repeated measures design for this study. What would you probably choose to do? Support your responses.
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this the right interpretation for the margin of error?
use this information to answer the next two questions. a researcher at a major hospital wishes to estimate the
the following data summarizes the historical demand for a productmonthnbspnbspnbspnbsp actual
Under what circumstances should a nonparametric test be used? Explain. What are the strengths and weaknesses of nonparametric tests?
a two-stage clinical trial is planned for for testing h0 p0.10 versus ha pgt0.10 where p is the proportion of
let x be a discrete and nonnegative r.v. show thatexnbsp
the mean gross annual income of certified welders are normally distruted with the mean of 20000 and a standard
You are taking a multiple-choice quiz that consist of 7 questions. find the probability of guessing exactly four answers correctly.
you get to choose between two envelopes each of which contains a check for some positive amount of money. unlike in the
What are the benefits and drawbacks of traditional and authentic assessments in math and science?
The total blood cholesterol concentrations, in mg/dL, are shown below for a random sample of six people. In the table below, x is the age of the subject and y is the subject's total cholesterol concentration. Find the 95% prediction interval when ..
let x be a random variable with fxx 2x3 if xgt1. compute pxgtk and compare it with the upper bound on this quantity
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