Assessment 2 concepts quiz

What does the letter "r" represent in correlation or regression?

• Co-efficient of variation

• Correlation Co-efficient

• Co-efficient of determination

• Intercept

  In probability what describes a set of all possible results associated with a test?E

• Experiment

• Outcome

• Event

• Replacement

If one variable is causing the changes in a second variable the two variables will be strongly correlated.

• TRUE

• FALSE

The standard normal distribution is when the mean = 0, standard deviation = 0 and the cumulative = TRUE

• TRUE

• FALSE

What is the inter quartile range if Min = 5, Q1 = 10?, Median = 15, Q3 = 20 and Max = 25?

• 5

• 10

• 15

• Need more information

Two events are not connected to each other, e.g. throwing a six on a dice and a head on a coin, this is known as.

• Mutually Exclusive

• Conditional

• Independent

• Dependent

If the standard deviation of a set of data is 4 what would the variance be?

• 32

• 2

• 4

• 16

All Z values of the Properties of the Standard Normal Distribution range from...?

• 0-1

• -1 to +1

• -3 to +3

• Depends on the situation

Find the linear equation when the Slope = 3.25 Correlation Coefficient = 0.87 Intercept = -13.25 Standard Deviation = 2.43

• y= 3.25x-13.25

• y= -13.25x +3.25

• y = 0.87x -13.25

• y = 3.25x + 2.43

Choose the strongest correlation from the list below

• -0.86

• 0.81

• 0.56

• -0.20