Stat Challenge (Lessons on Random Variables)

Stat Challenge (Lessons on Random Variables)

11th Grade

15 Qs

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Stat Challenge (Lessons on Random Variables)

Stat Challenge (Lessons on Random Variables)

Assessment

Quiz

Mathematics

11th Grade

Hard

Created by

Merliza Dizon

Used 160+ times

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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a discrete random variable?

The height of the study table used for online class.

The time to finish answering a Statistics and Protest.

The number of COVID-19 recoveries.

The average weight before and during the pandemic.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a continuous random variable?

The number of grade 11 students attending synchronous classes.

The average amount of electricity consumed monthly..

The number of COVID-19 cases.

The number of defective gadgets produced by a manufacturer.

 

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a true statement?

Random variables can only have one variable.

The value of a random variable could be zero.

The probability of the value of a random variable could be 1/2.

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

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If two coins are tossed, which is not a possible value of the random variable for the number of heads?

0

1

2

3

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT TRUE about expected value?

Expected value is an important indicator of the fairness of the game and the performance of business.

Expected value is an ideal way to make decisions because it allows you to quantify and incorporate risk into your decision making, as well as balance potentially good and bad outcomes in the same equation.

A negative expected value indicates a higher chance of winning and it indicates that the game is fair, while in business, it indicates a higher chance of profit.

A zero expected value indicates that the game is fair and in business, it represents the break-even point of the business.

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Suppose three coins are tossed. Let H represent head and T represent tail. What is the sample space for this experiment?

S = {TTT, TTH, THT, HTT, HHT, HTH, THH, HHH}

S = {TTT, TTH, HHT, HHH}

S = {TT, TH, HT}

S = {T, H}

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Media Image

Matt is working at XYZ bookstore. While doing an inventory, he decided to see just how many books are being sold in a week. The number of books sold per day at the store varies as shown in the given probability distribution below. What is the probability that Matt will sell 5 books?

0.1 or 10%

0.2 or 20%

0.3 or 30%

0.5 or 50%

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