Pre-Test in Elementary Statistics & Probability.

1. PRE-TEST
ELEMENTARY STATISTICS & PROBABILITY

2. 1. If three coins are tossed, which is NOT
a possible value of the random variable
for the number of tails?
A. 1
B. 2
C. 3
D. 4

3. 2. Which of the following is a discrete
random variable?
A. Length of electrical wires
B. Number of pencils in a box
C. Amount of sugar used in a cup of coffee
D. Voltage of car batteries

4. 3. Which formula gives the probability
distribution shown by the table below?
A. P(x) = x
B. P(x) = 1/x
C. P(x) = x/3
D. P(x) = x/5
x 3 4 5
P(x) 1/3 1/4 1/5

5. 4. How many ways can a “double” come
out when you roll a pair of dice?
A. 2
B. 4
C. 6
D. 8

6. 5. It is a numerical quantity that is
assigned to the outcome of an
experiment.
A. Random Variable
B. Variable
C. Probability
D. Probability Distribution

7. 6. It is the central or average of its
corresponding probability mass function.
A. Mean
B. Median
C. Mode
D. Standard Deviation

8. 7. What is the mean outcome if a pair of
die is rolled once?
A. 1.5
B. 2.5
C. 3.5
D. 4.5

9. 8. Find the mean probability distribution
involving the random variable X that gives
the number of heads that appear after
tossing four coins once.
A. 4
B. 3
C. 2
D. 1

10. 9. The probabilities that a printer
produces 0, 1, 2 and 3 misprints are 42%,
28%, 18% and 12% respectively. What is
the mean value of the random variable?
A. 1
B. 2
C. 3
D. 4

11. 10. These are two values that describe how
scattered or spread out the scores are from
the mean value of the random variable.
A. Variance and Standard Deviation
B. Mean and Probability Distribution
C. Statistics and Probability
D. Mean and Standard Deviation

12. 11. What is the other term for Normal
Distribution?
A. Gaussian Distribution
B. Poisson Distribution
C. Bernoulli’s Distribution
D. Probability Distribution

13. 12. What is the total area in the
distribution under the normal curve?
A. 0
B. 1
C. 2
D. 3

14. 13. Which of the following are the
parameters of normal distribution?
A. Variance and Standard Deviation
B. Mean and Probability Distribution
C. Statistics and Probability
D. Mean and Standard Deviation

15. 14. The graph of a normal distribution is
symmetrical about the ________.
A. Mean
B. Standard Deviation
C. Variance
D. Sample

16. 15. What percent of the area under a
normal curve is within 2 standard
deviations?
A. 68.3%
B. 95.4%
C. 99.7%
D. 100.0%

17. 16. It refers to the entire group that is
under study or investigation.
A. Population
B. Sample
C. Variable
D. Subset

18. 17. It is a subset taken from a population,
either by random or non-random
sampling techniques.
A. Population
B. Sample
C. Variable
D. Subset

19. 18. It refers to a part of the sampling
technique where each sample point has
an equal chance of being selected.
A. Stratified Sampling
B. Clustered Sampling
C. Random Sampling
D. Systematic Sampling

20. 19. In an achievement test, the mean
score of normally distributed values is 70
and the standard deviation is 12. What is
the percentage of students who got a
score of 85 and above?
A. 10.56%
B. 10.75%
C. 89.25%
D. 89.44%

21. 20. There are 10 people at a party who
shakes hands with each other. If each two
of them shake hands with each other,
how many handshakes happen at the
party?
A. 964
B. 856
C. 792
D. 642

23. 1. If three coins are tossed, which is NOT
a possible value of the random variable
for the number of tails?
A. 1
B. 2
C. 3
D. 4

24. 2. Which of the following is a discrete
random variable?
A. Length of electrical wires
B. Number of pencils in a box
C. Amount of sugar used in a cup of coffee
D. Voltage of car batteries

25. 3. Which formula gives the probability
distribution shown by the table below?
A. P(x) = x
B. P(x) = 1/x
C. P(x) = x/3
D. P(x) = x/5
x 3 4 5
P(x) 1/3 1/4 1/5

26. 4. How many ways can a “double” come
out when you roll a pair of die?
A. 2
B. 4
C. 6
D. 8

27. 5. It is a numerical quantity that is
assigned to the outcome of an
experiment.
A. Random Variable
B. Variable
C. Probability
D. Probability Distribution

28. 6. It is the central or average of its
corresponding probability mass function.
A. Mean
B. Median
C. Mode
D. Standard Deviation

29. 7. What is the mean outcome if a pair of
die is rolled once?
A. 1.5
B. 2.5
C. 3.5
D. 4.5

30. 8. Find the mean probability distribution
involving the random variable X that gives
the number of heads that appear after
tossing four coins once.
A. 4
B. 3
C. 2
D. 1

31. 9. The probabilities that a printer
produces 0, 1, 2 and 3 misprints are 42%,
28%, 18% and 12% respectively. What is
the mean value of the random variable?
A. 1
B. 2
C. 3
D. 4

32. 10. These are two values that describe how
scattered or spread out the scores are from
the mean value of the random variable.
A. Variance and Standard Deviation
B. Mean and Probability Distribution
C. Statistics and Probability
D. Mean and Standard Deviation

33. 11. What is the other term for Normal
Distribution?
A. Gaussian Distribution
B. Poisson Distribution
C. Bernoulli’s Distribution
D. Probability Distribution

34. 12. What is the total area in the
distribution under the normal curve?
A. 0
B. 1
C. 2
D. 3

35. 13. Which of the following are the
parameters of normal distribution?
A. Variance and Standard Deviation
B. Mean and Probability Distribution
C. Statistics and Probability
D. Mean and Standard Deviation

36. 14. The graph of a normal distribution is
symmetrical about the ________.
A. Mean
B. Standard Deviation
C. Variance
D. Sample

37. 15. What percent of the area under a
normal curve is within 2 standard
deviations?
A. 68.3%
B. 95.4%
C. 99.7%
D. 100.0%

38. 16. It refers to the entire group that is
under study or investigation.
A. Population
B. Sample
C. Variable
D. Subset

39. 17. It is a subset taken from a population,
either by random or non-random
sampling techniques.
A. Population
B. Sample
C. Variable
D. Subset

40. 18. It refers to a part of the sampling
technique where each sample point has
an equal chance of being selected.
A. Stratified Sampling
B. Clustered Sampling
C. Random Sampling
D. Systematic Sampling

41. 19. In an achievement test, the mean
score of normally distributed values is 70
and the standard deviation is 12. What is
the percentage of students who got a
score of 85 and above?
A. 10.56%
B. 10.75%
C. 89.25%
D. 89.44%

42. 20. There are 10 people at a party who
shakes hands with each other. If each two
of them shake hands with each other,
how many handshakes happen at the
party?
A. 964
B. 856
C. 792
D. 642