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Question 1

Suppose the relationship between your study time and your grade on a Economics midterm is given by the following table:

What is the "marginal grade improvement (MGI)" of the 5

points

If you study for | Your grade will be |
---|---|

4 hours | 79 |

5 hours | 92 |

6 hours | 94 |

What is the "marginal grade improvement (MGI)" of the 5

^{th}hour of studying?points

Hint

Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172

Enter DNE for Does Not Exist, oo for Infinity

13

Question 2

What is the "marginal grade improvement (MGI)" of the 6

points

^{th}hour of studying?points

Hint

Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172

Enter DNE for Does Not Exist, oo for Infinity

2

Question 3

Why might the MGI be diminishing?

Hint

Box 1: Enter your answer as text. This question is not automatically graded.

One reason might be that too much studying in one night results in the student not getting enough rest, and so causes diminishing marginal learning.