AI Revision 2

Question 1

9. What value does 3 represent?

Accepted Answer

25% of the data

Question 2

3. What could you use to solve this equation? 48x=3x-7

Accepted Answer

Graph, Numerical solve

Question 3

2. How do you enter data to the calculator for chi2?

Accepted Answer

Matrix, Scratchpad

Question 4

6. Which calculator option do you select for finding Pearson's Correlation Coefficient?

Accepted Answer

2. Two-variable statistics, 4. Linear Regression (a+bx), 3. Linear Regression (mx+b)

Question 5

5. What could you use to solve these equations? 4p-9q=14,10p-8q=19

Accepted Answer

Solve system of linear equations

Question 6

14. Which letter represents the angle of depression?

Accepted Answer

b

Question 7

13. What clue does 'given that' tell you about a question?

Accepted Answer

You need to look in your formula booklet, It is conditional probability, You need to change the denominator

Question 8

4. What could you use to solve this equation? x^2-6x+12=0

Accepted Answer

Graph, Find roots of polynomial

Question 9

10. What does 'initial' value mean in this equation, where v is velocity and t is time in seconds. v\left(t\right)=2t-6

Accepted Answer

Velocity when time is zero, -6

Question 10

7. What value does 1 represent?

Accepted Answer

Median

Question 11

8. What value does 2 represent?

Accepted Answer

Upper quartile

Question 12

11. In a statistical test, when you do accept the alternative hypothesis?

Accepted Answer

Critical value < calculated value, p value < significance value

Question 13

15. Which letter represents the angle of elevation from B?

Accepted Answer

a

Question 14

1. What is the null hypothesis of a chi2 test?

Accepted Answer

The variables are independent.

Question 15

12. What can probabilities NOT be?

Accepted Answer

A negative value, An improper fraction

Questions 15