Statistics For Social Sciences Quiz 2

The correlation coefficient of a data is 0.64. What is the coefficient of determination of this data?

• 0.21

• 0.32

• 0.41

• 0.80

Given that the coefficient of determination is 0.36, what is the correlation coefficient?

• 0.12

• 0.1296

• 0.18

• 0.6

What is the average cost for five items, if the costs are $2.56, $3.91, $0.63, $1.27 and $4.08?

• $4.15

• $6.23

• $2.49

• $12.45

Which of the following describes a continuous random variable? The:

• volume of juice in a bottle.

• number of apples on a tree.

• quantity of sweets in a jar.

• total bags of cement on a truck.

Which of the following describes a discrete random variable? The:

• height of a tree.

• number of books in a student's bag.

• amount of lotion in a bottle.

• quantity of ice-cream in a bucket.

What is the lower class limit for the interval 25 - 36?

• 24.5

• 25

• 36

• 36.5

What is the upper class limit for the interval 47 - 68?

• 46.5

• 47

• 68

• 68.5

What is the class size of the interval 50 - 84?

• 34

• 35

• 67

• 134

What is the class midpoint for the interval 31 - 59?

• 28

• 29

• 45

• 90

What is the mode for the set of numbers: 5, 8, 7, 9, 8, 6, 9, 5, 8, 7?

• 5

• 7

• 8

• 9