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Diagnostic Test in Statistics and Probability

Authored by LARA SHANE IBAL

Mathematics

11th Grade

Diagnostic Test in Statistics and Probability
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50 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes a random variable?

A variable whose values are finite.

A variable whose values are infinite.

A variable whose values are countable.

A variable whose values are determined by chance.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a discrete random variable?

the sugar content of an orange juice

the average height of senior high school students

the distance that a car can drive on a full tank gas

the number of heads obtained in three tosses of a coin

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which is not a possible value of the random variable for the number of heads if two coins are tossed?

0

1

2

3

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a true statement?

Random variables can only have one value.

The value of the random variable could be zero.

The probability of the value of a random variable could be zero.

The sum of all the probabilities in a probability distribution is always equal to one.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

The random variable x, representing the number of nuts in a chocolate bar has the following probability distribution. What is the mean?

1.9

2.0

2.1

2.2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which formula gives the probability distribution shown by the table?

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct formula in finding the mean of a discrete random variable X?

μ=∑ x ∙ P(x)

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