Regional Diagnostic Assessment Statistics and Probability
QuizΒ by alejandromallari@deped.gov.ph
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- Q1
A variable that allows for an endless number of possible values for the information or data
Quantitative
Discrete variable
Qualitative variable
Continuous variable
30s - Q2
Of the following, which is a discrete random variable?
Jose has four sisters
Jose weighs 68 kilograms
Jose is 163 cm tall
Jose ran 300 meters in one and a half minutes
30s - Q3
You make the decision to gather several Coke cans and gauge the amount of soda contained in each one. Assume that there are x sodas in each can. X is what kind of variable?
x is a continuous random variable
x is a place holder
x is a constant
x is a discrete random variable
30s - Q4
You've decided to order a pizza, but first you must select the toppings and type of dough. Which of the following should you pick if there are only 6 viable pizza ordering combinations?
Crust: thin or deep-dish Toppings: cheese or pepperoni
Crust: thin or deep-dish Toppings: cheese, bacon, sausage, pepperoni or hotdog
Crust: thin or deep-dish Toppings: cheese, bacon, sausage or pepperoni
Crust: thin or deep-dish Toppings: cheese, bacon or pepperoni
30s - Q5
What are the potential values of the random variable for the number of tails if a coin is tossed?
0, 1Β
0, 1, 2
1, 2, 3
0, 1, 2, 3
30s - Q6
What is the total probability of all possible random variable values?
β π(π)) = 10
β π(π)) = 1
β π(π)= 0
β π(π)) = 1/10
30s - Q7
If P(X)= π₯/6, what are the possible values of X for it to be a probability distribution?
1,1,2
1,2,3
2,3,4
0,2,3
30s - Q8
The given table represents a probability distribution. What is P(1) + P(4)?
2/3
1/3
1/6
Β½
30s - Q9
What is the correct procedure to follow to calculate the standard deviation if the variance of a probability distribution is 2.6 grams?
β2.6
1.61
(2.6)
1.61 β 2.6
30s - Q10
What formula should be applied to determine the expected value?
πΈ(π₯) = β π₯ β π (π₯)
πΈ(π₯) = β π₯ β π (π₯)2
πΈ(π₯) = β π₯ /π (π₯)
πΈ(π₯) = β π₯ β π (π₯)
30s - Q11
What can we get if we add up the values that each random variable was assigned, along with the appropriate probabilities?
Probability value
Expected Value
Standard Deviation
Variance
30s - Q12
Which of the following data demonstrates the potential for the greatest variety or variability?
number of pieces of French fries in a regular pack from different orders of customers at McDonalds
number of boys in families of three-children
number of customers per hour who went shopping at SM Super Malls
number of heads that will appear if two coins are tossed together repeatedly
30s - Q13
Which of the following is NOT a variance property?
The variance is a value that is always positive.
A large variance means that the distribution is spread out, with some chance of observing values at some distance from the mean.
A small variance means that the distribution of the random variable is narrowly concentrated around the mean.
The variance is a value that is always negative.
30s - Q14
Which of the following is the correct formula to find the expected value of the probability distribution?
πΈ(π₯) = ββ[π₯2 β π(π₯)] β π’
πΈ(π₯) = β[π₯ β π(π₯)]
πΈ(π₯) = β[π₯2 β π(π₯)] β π’2
πΈ(π₯) = β[π₯2 β π(π₯)]
30s - Q15
What is the probability distribution's mean or anticipated value?
5.64
6.32
7.12
4.85
30s