Statistics and Probability ROQ - 1
Quiz by Raymund de la Cruz
Feel free to use or edit a copy
includes Teacher and Student dashboards
Measure skillsfrom any curriculum
Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.
- edit the questions
- save a copy for later
- start a class game
- automatically assign follow-up activities based on students’ scores
- assign as homework
- share a link with colleagues
- print as a bubble sheet
- Q1
Which of the following illustrates a random variable?
The length of new-born babies
The number of students per grade level
All choices
The speed of a train
30s - Q2
What random variable produce set of possible outcomes that is countable?
both discrete and continuous random variable
continuous random variable
none of the choices
discrete random variable
30s - Q3
Which of the following random variable belongs to a continuous random variable?
the number of turnovers made by a team
the area covered by a basketball court
the number of free throws made by a player
the number of timeouts remaining
30s - Q4
Which of the following DOES NOT belong to the group?
the temperature of a person entering the mall
the remaining number of seats in a classroom
the time it takes to finish taking a bath
the average points of a basketball player in a season
30s - Q5
Whichof the following is NOT a possible value of a random variable?
30s - Q6
Suppose that 2 out of 10 bags delivered by a company is damaged. If a store receives 3 of these bags, then what are the possible values of the random variable 𝑋 representing the number of damaged bags?
60s - Q7
Which of the following is NOT a possible value of a probability of a value of a random variable in a discrete probability distribution?
30s - Q8
What is the sum of the probabilities in a particular discrete probability distribution?
30s - Q9
What is the value of the missing probability in the probability distribution?
120s - Q10
The table shows the probability distribution of random variable representing the number of cellular phones sold in a gadget store. What is the probability that at most 4 cellphones will be sold?
120s - Q11
What should be solved when the expected value is asked?
mean
mode
standard deviation
variance
30s - Q12
A random variable can take only values 2 and 5 with 0.8 and 0.2 probabilities respectively. What is the mean?
300s - Q13
A random variable can take only values 1 and 2 with 0.8 and 0.2 probabilities respectively. If the mean is 1.2, what is the variance?
300s - Q14
A random variable can take only values 1 and 2 with 0.6 and 0.4 probabilities, respectively. What is the mean?
300s - Q15
In barangay Payapa, 80% of the teenagers has 1 cellphones and 20% has 2. What is the expected number of cellphones that a teenager has in barangay Payapa?
300s