Dr Nick

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About Dr Nick

Levels Tought:
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Expertise:
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Teaching Since: May 2017
Last Sign in: 273 Weeks Ago
Questions Answered: 19234
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Education

  • MBA (IT), PHD
    Kaplan University
    Apr-2009 - Mar-2014

Experience

  • Professor
    University of Santo Tomas
    Aug-2006 - Present

Category > Applied Sciences Posted 30 May 2017 My Price 15.00

person who spent 7 hours preparing for the test

The paired data below consists of test scores and hours of preparation for 5 randomly selected students.

x    Hours of preparation      5     2     9      6   10

y    Test score                        64   48   72    73   80

1. Use the given data and MS Excel and find the correlation coefficient r, regression equation and scatter plot.

2. Based on the linear correlation coefficient r, and  a = 0.05, is this a good model?  Explain.

3.  What is the best predicted test score for a student who spent 7 hours preparing for the test?

4.  Find the standard error . Use the formula or Microsoft Excel Regression

5.  Find the 99% prediction interval for the test score of a person who spent 7 hours preparing for the test given that E = 34.677. Interpret the result.

6.  Find the explained variation.

7.  Find the unexplained variation.

8.  Find the total variation.

9.  Find the value of r2 and explain its meaning.

10.  If the data point (3, 100) is added to the data set, how would this affect the results of the regression analysis?  Is this data point an outlier, influential point or both?  Explain.

Answers

Dr Nick
(3)
Status NEW Posted 30 May 2017 12:05 PM My Price 15.00

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