Question

Marks: 1

A bag of marbles contains 3 white and 4 black marbles. A marble will be drawn from the bag randomly three times and put back into the bag. Relative to the outcomes of the first two draws, the probability that the third marble drawn is white is:

Choose one answer.

	a. Independent
	b. Conditional
	c. Unconditional
	d. Dependent

Question54

Marks: 1

A parking lot has 100 red and blue cars in it.

• 40% of the cars are red.
• 70% of the red cars have radios.
• 80% of the blue cars have radios.

What is the probability that the car is red given that you already know that it has a radio?

Choose one answer.

	a. 0.28
	b. 0.65
	c. 0.48
	d. 0.37

Question55

Marks: 1

Which of the following methods produces a particularly stiff penalty in periods with large forecast errors?

Choose one answer.

	a. decomposition
	b. MSE
	c. MAD
	d. MAPE

Answer 1