3/2/25, 6:10 PM FIRST QUARTER EXAM: Attempt review

Home / My courses / BAED-STAT2112-2422S / FIRST QUATER EXAM / FIRST QUARTER EXAM

Started on Saturday, 1 March 2025, 10:14 AM

State Finished
Completed on Saturday, 1 March 2025, 10:53 AM
Time taken 39 mins 3 secs
Marks 50.00/50.00
Grade 100.00 out of 100.00

Question 1
Correct

Mark 1.00 out of 1.00

Five balls numbered 1, 2, 3, 4, and 5 are placed in a box. One is selected, its number is noted and then it is replaced. If this experiment is
repeated many times, find the standard deviation of the numbers on the balls.

a. 3

b. 1.41

c. 2

d. None of the choices

Your answer is correct.

Question 2

Correct

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The normal distribution curve is symmetric about the mean.

a. Cannot be determined

b. True

c. None of the choices

d. False

Your answer is correct.

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Question 3

Correct

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The normal curve is often called Gaussian distribution.

a. None of the choices

b. True

c. False

d. Cannot be determined

Your answer is correct.

Question 4
Correct

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It is a perfectly symmetric, mound-shaped distribution.

a. Standard distribution

b. Normal distribution

c. Both A and B 

d. Gaussian Distribution

Your answer is correct.

Question 5
Correct

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It is applied when the probability of success are not the same from trial to trial.

a. Binomial Experiment

b. Hypergeometric Experiment

c. Discrete Probability Distribution

d. Poisson Experiment

Your answer is correct.

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Question 6

Correct

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It is useful for describing the number of events that will occur during a specific interval of time or in a specific distance, area, or volume.

a. Discrete Probability Distribution

b. Poisson Experiment

c. Hypergeometric Experiment

d. Binomial Experiment

Your answer is correct.

Question 7
Correct

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It is a mapping or list of all values of a random variable to their corresponding probabilities for a given sample space.

a. Cumulative Distribution Function

b. Random Experiment

c. Probability Distribution

d. None of the choices

Your answer is correct.

Question 8
Correct

Mark 1.00 out of 1.00

Five balls numbered 1, 2, 3, 4, and 5 are placed in a box. One is selected, its number is noted and then it is replaced. If this experiment is
repeated many times, find the mean of the numbers on the balls.

a. 2

b. 3

c. 1.41

d. None of the choices

Your answer is correct.

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Question 9

Correct

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These are random variables that can assume all values between any two specific values.

a. Continuous random variables

b. Countable random variables

c. Discrete random variables

d. None of the choices

Your answer is correct.

Question 10
Correct

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It is commonly referred to as a normal curve, or bell curve.

a. Normal Distribution

b. Probability distribution

c. Standard distribution

d. None of the above

Your answer is correct.

Question 11
Correct

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These are the most important characteristics of any probability distribution.

a. Mean, median and mode

b. Mean and standard deviation

c. Variance

d. None of the above

Your answer is correct.

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Question 12

Correct

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Determine what type of random variable is represented in the given scenario.

“Number of television per household”

a. Independent Variables

b. Discrete random variables

c. Continuous random variables

d. Dependent Variables

Your answer is correct.

Question 13
Correct

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The area under the part of a normal curve that lies within two standard deviation of the mean is ________.

a. about 34.13%

b. about 68%

c. about 99.7%

d. about 95%

Your answer is correct.

Question 14
Correct

Mark 1.00 out of 1.00

When you roll the two dice, what is the probability that the sum is 4?

a. 7/12

b. 1/12

c. 5/12

d. 11/12

Your answer is correct.

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Question 15

Correct

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What is the probability that the total of two dice will be greater than 9, given that the first die is a 5?

a. 7/36

b. 5/12

c. 11/36

d. 1/3

Your answer is correct.

Question 16
Correct

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The probability of success remains the same from trial to trial.

a. Discrete Probability Distribution

b. Binomial Experiment

c. Hypergeometric Experiment

d. Poisson Experiment

Your answer is correct.

Question 17
Correct

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The normal curve is asymptotic.

a. True

b. Cannot be determined

c. False

d. None of the choices

Your answer is correct.

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Question 18

Correct

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It is a function or rule that assigns a number to each outcome of an experiment.

a. Probability Experiment

b. Independent Variable

c. Random variable

d. Dependent Variable

Your answer is correct.

Question 19
Correct

Mark 1.00 out of 1.00

The experiment consists of counting the number of events that will occur during a specific interval of time or in a specific distance, area,
or volume.

a. Poisson Experiment

b. Hypergeometric Experiment

c. Discrete Probability Distribution

d. Binomial Experiment

Your answer is correct.

Question 20
Correct

Mark 1.00 out of 1.00

The normal distribution is bell-shaped.

a. Cannot be determined

b. False

c. None of the choices

d. True

Your answer is correct.

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Question 21

Correct

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The normal distribution is continuous.

a. False

b. None of the choices

c. Cannot be determined

d. True

Your answer is correct.

Question 22
Correct

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There are only two possible outcomes for each trial, success and failure.

a. Hypergeometric Experiment

b. Binomial Experiment

c. Discrete Probability Distribution

d. Poisson Experiment

Your answer is correct.

Question 23
Correct

Mark 1.00 out of 1.00

A vintage car breaks down an average of four times per month. Find the probability that during the next month this vintage card will have at
most two breakdowns.

a. 0.0183

b. 0.1465

c. 0.2381

d. 0.0733

Your answer is correct.

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Question 24

Correct

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It is a result of a single trial of a probability experiment.

a. Outcome

b. Chance

c. Sample space

d. Experiment

Your answer is correct.

Question 25
Correct

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The most common way to measure the spread of a normal distribution.

a. Standard deviation

b. Mean

c. Mode

d. Median

Your answer is correct.

Question 26
Correct

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The mean, median and mode have different values in a normal distribution.

a. None of the choices

b. False

c. True

d. Cannot be determined

Your answer is correct.

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Question 27

Correct

Mark 1.00 out of 1.00

Determine what type of random variable is represented in the given scenario.

“Number of DVD monthly sales in a Video Center”

a. Continuous random variables

b. Discrete random variables

c. Dependent Variables

d. Independent Variables

Your answer is correct.

Question 28
Correct

Mark 1.00 out of 1.00

The area under the part of a normal curve that lies within three standard deviation of the mean is ________.

a. about 34.13%

b. about 99.7%

c. about 95%

d. about 68%

Your answer is correct.

Question 29
Correct

Mark 1.00 out of 1.00

Determine what type of random variable is represented in the given scenario.

“Outcomes in rolling a pair of dice”

a. Continuous random variables

b. Dependent Variables

c. Discrete random variables

d. Independent Variables

Your answer is correct.

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Question 30

Correct

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This is a complete description of all the possible values of the random variable, along with their associated probabilities.

a. Cumulative Distribution Function

b. Random Experiment

c. None of the choices

d. Probability Distribution

Your answer is correct.

Question 31
Correct

Mark 1.00 out of 1.00

Five balls numbered 1, 2, 3, 4, and 5 are placed in a box. One is selected, its number is noted and then it is replaced. If this experiment is
repeated many times, find the variance of the numbers on the balls.

a. 2

b. 1.41

c. 3

d. None of the choices

Your answer is correct.

Question 32
Correct

Mark 1.00 out of 1.00

Random means that the experiment may result in one of several possible values of the variable.

a. None of the choices

b. True

c. Cannot be determined

d. False

Your answer is correct.

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Question 33

Correct

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DOLE found that 83% of Filipinos think that having a college education is important to succeed in life. If a random sample of 7 Filipinos is
selected, find the probability that exactly 4 will agree with that statement.

a. 0.0819

b. 0.0817

c. 0.0816

d. 0.0818

Your answer is correct.

Question 34
Correct

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It is a measure of how spread out the values are.

a. Standard deviation

b. Mean

c. Median

d. Mode

Your answer is correct.

Question 35
Correct

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It represents the numerical value of a simple event of an experiment.

a. Dependent Variables

b. Random variables

c. Probability Experiments

d. Independent Variables

Your answer is correct.

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Question 36

Correct

Mark 1.00 out of 1.00

Determine what type of random variable is represented in the given scenario.

“The amount of time represents a task.”

a. Discrete random variables

b. Dependent Variables

c. Independent Variables

d. Continuous random variables

Your answer is correct.

Question 37
Correct

Mark 1.00 out of 1.00

The area under the part of a normal curve that lies within one standard deviation of the mean is ________.

a. about 95%

b. about 99.7%

c. about 68%

d. about 34.13%

Your answer is correct.

Question 38
Correct

Mark 1.00 out of 1.00

It is a measure of the number of standard deviations a particular data point is away from the mean.

a. p-value

b. z-score

c. t-score

d. variance

Your answer is correct.

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Question 39

Correct

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It is the set of all possible outcomes of a probability experiment.

a. Outcome

b. Sample space

c. Experiment

d. Chance

Your answer is correct.

Question 40
Correct

Mark 1.00 out of 1.00

Five hundred raffle tickets are sold at ₱25 each for three prizes of ₱4,000, ₱2,500, and ₱1,000. After each prize drawing, the winner ticket
is then returned to the collection of tickets. What is the mean or expected value if a person purchases four tickets?

x
₱3,900
₱2,400

₱900
-₱100
P(x)

4/500
4/500

4/500
496/500

a. -₱19.20

b. ₱99.2

c. -₱41.60

d. ₱31.20

Your answer is correct.

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Question 41

Correct

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The experiment consists of n independent, identical trials

a. Binomial Experiment

b. Discrete Probability Distribution

c. Hypergeometric Experiment

d. Poisson Experiment

Your answer is correct.

Question 42
Correct

Mark 1.00 out of 1.00

It is the square root of the variance.

a. Mode

b. Median

c. Mean

d. Standard deviation

Your answer is correct.

Question 43
Correct

Mark 1.00 out of 1.00

When you roll the two dice, what is the probability that the sum is 9?

a. 1/9

b. 5/36

c. 7/36

d. 2/9

Your answer is correct.

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Question 44

Correct

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A package of 8 AAA size batteries contains 2 that are defective and 6 that are non – defective. If we select 4 batteries at random from the
package, what is the probability that the sample contains exactly 1 defective battery?

a. 58%

b. 0.5714%

c. 57.14% 

d. 57%

Your answer is correct.

Question 45
Correct

Mark 1.00 out of 1.00

Determine what type of random variable is represented in the given scenario.

“Weight of the employees in a call center company”

a. Dependent Variables

b. Discrete random variables

c. Independent Variables

d. Continuous random variables

Your answer is correct.

Question 46
Correct

Mark 1.00 out of 1.00

These are random variables that can take on any of the countless number of values in an interval.

a. Discrete random variables

b. Countable random variables

c. Continuous random variables

d. None of the choices

Your answer is correct.

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Question 47

Correct

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The normal distribution is unimodal.

a. False

b. None of the choices

c. True

d. Cannot be determined

Your answer is correct.

Question 48
Correct

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It is a numerical measure of the likelihood that a specific event will occur.

a. Probability

b. Statistics

c. Variable

d. Experiment

Your answer is correct.

Question 49
Correct

Mark 1.00 out of 1.00

These are random variables that can assume only a countable number of values.

a. Countable random variables

b. Discrete random variables

c. None of the choices

d. Continuous random variables

Your answer is correct.

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Question 50

Correct

Mark 1.00 out of 1.00

DOLE found that 83% of Filipinos think that having a college education is important to succeed in life. If a random sample of 7 Filipinos is
selected, find the probability that at most two people will agree with that statement.

a. 0.0021

b. 0.0816

c. 0.0020

d. 0.0000

Your answer is correct.

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