For Questions , Use the Following Narrative

question 23

Essay

For Questions , use the following narrative
Narrative: Study time and exam score
Suppose an algebra professor found that the correlation between study time (in hours) and exam score (out of 100) is +.80, and the regression line was found to be y = 20 + 4x.He arrived at this equation through years of collecting data on his students, most of whom reported studying anywhere from 0 to 20 hours for his exams.
-{Study time and exam score narrative} What meaning (if any) does the slope of 4 have in this situation? Use words that a non-statistics student would be able to understand.

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Definitions:

Gross Savings

The total amount of savings generated by an economy before accounting for depreciation costs.

Personal Savings

The portion of disposable income not spent on consumption but kept aside for future use or emergencies.

Business Savings

Business Savings refers to the portion of a business's profits that are set aside for future investment, as opposed to being distributed to shareholders or used for current expenses.

Government Savings

Funds accumulated by a government when it receives more money from taxes and other revenues than it spends.