A researcher believes that there is a positive relationship between the time spent in studying and...

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A researcher believes that there is a positive relationshipbetween the time spent in studying and the score a student gets atthe end of the semester. She selected a sample of students andrecorded the following data:

Time Spent in minutes

Score out of 100

120

86

75

83

60

78

45

75

180

91

30

72

90

84

After analyzing the data using Microsoft Excel, the researchergot the outputs below:

Answer the following (Please, use at least 2 decimals when youtype numbers ):

a.    The correlation coefficient (r) =Answer

b.    The relationship between the timespent in studying and the score a student gets is: Answerweak andpositivestrong and negativeweak and negativestrong and positive

c.    The y-intercept equals: Answer

d.    The regression (time spent)coefficient equals = Answer

e.    The regression model will be:AnswerScore = 70.704 + 0.123 MinuteMinute = 0.123 + 70.704ScoreScore = 0.123 + 70.704 MinuteMinute = 70.704 + 0.123 Score

f.     From the regression model, theresearcher can predict that if a student spends 2.5 hours, thescore he gets will be: Answer

g.    From the regression model, if astudent did not study at all, his score would be expected to be:Answer

h.    The coefficient of determination forthis model is:  Answer95708890%

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Q A researcher believes that there is a positiverelationship between the time spent in studying and the score astudent gets at the end of the semester a The correlation coefficient    See Answer
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