Saved 1. What is the purpose of models? To use accurate assumptions To make us f

Question

Saved 1. What is the purpose of models? To use accurate assumptions To make us feel good about our modeling ability To provide good predictions 2. Select all of the normative statements from the options below Tax cuts are the best form of economic stimulus. The unemployment rate is 85% GDP is at the highest level it has ever been. The government doesn't spend enough money on social programs. 3. If a student gets an 80% on the first exam, and a 90% on the second exam, we could say that they had a improvement. percent 4. Solve for x: 20-3x+5 5. What is my last name?

Explanation / Answer

1. The purpose of models is to provide good predictions about the data set. A model is fit based on the characteristics of the data amd is expeexpe to give approximate results for the data set.

2. Normative statements are opinion or judgement about a situation. They can't be proved or disproved.

Of the given options, the fourth option, that is, the government doesn't spend enough money on social programs is a normative statement since it gives a judgement about the government.

3. Increase in scores from 80% to 90%.

Let us assume that the total score is 100.

So the absolute change in score = new score - original score

= 0.90-0.80 = 0.10

And percentage change in score = (absolute change in score / original score) * 100

= (0.10 / 0.80) * 100 % = 12.5 %

Thus, the student had a 12.5% improvement.

4. Given, 20 = 3x + 5

Or, 20 - 5 = 3x

Or, 3x = 15

Or, x = 15/3 = 5

Thus, x = 5

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