STAT. TECH. FOR BUSINESS AND ECO (LL)
STAT. TECH. FOR BUSINESS AND ECO (LL)
18th Edition
ISBN: 9781265679637
Author: Lind
Publisher: MCG
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Chapter 16, Problem 20E
To determine

State whether there is no effect of feed mixture on weight.

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You’re interested in knowing if a walking plus strength training exercise program results in a significantly greater increase in maxVo2 as compared to a walking only or a strength training only exercise program. Participants are randomly selected and then randomly assigned to one of three groups— walking plus strength training, walking only, or strength training only. After 6-months of exercise the participants are assessed. Which statistical analyses was used?
To study the effects of music on sleep quality in adults 18 years or older, 100 adults were given the Pittsburg Sleep Quality Index (PSQI) and then asked to listen to 30 min of music at bedtime for three weeks. At the end of the three weeks, subjects were given the PSQI again and the change in score was reported. (a) What type of experimental design is this? Matched paired design (b) What is the population being studied? adults 18 years or older (c) What are the experimental units? adults 18 or older (d) What is the response variable? PSQI (e) What is the explanatory variable? 30 Mins of music at bedtime (f) Name one other factor that could influence the response variable. This part will be hand graded.
In Hong Kong, some employers claim that they are willing to offer betterstarting salaries for those university graduates with a higher GPA. A study on Hong Kong university students was carried out. A simple random sample of 96 students who were admitted to Hong Kong universities between 2010 and 2013 was selected. Final cumulative GPA and starting salary (monthly salary in Hong Kong Dollars) of each participant were collected. A scatterplot of the two variables (gpa = final cumulative GPA; salary = starting salary) is shown below.
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