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THE ODDS ARE IN YOUR FAVOR: A STATISTICS AND PROBABILITY QUIZ Flashcards | StudBud
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THE ODDS ARE IN YOUR FAVOR: A STATISTICS AND PROBABILITY QUIZ
THE ODDS ARE IN YOUR FAVOR: A STATISTICS AND PROBABILITY QUIZ
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1
What is a probability distribution?
A graph that shows the most common outcome
A way to find the mean of a data set
A method for calculating probabilities using graphs
A function that assigns probabilities to each outcome of a random variable
2
A fair coin is tossed 3 times. What is the probability of getting exactly 2 heads?
5/8
1/8
1/2
3/8
3
Random variables can be classified as:
Discrete and continuous
Continuous and numerical
Nominal and ordinal
Dependent and independent
4
What is the median of the data set: 4, 7, 9, 10, 12?
8
9
7
10
5
Which of the following refers to thesubset of a population?
Variable
Statistic
Parameter
Sample
6
Which of the following is an example of a discrete random variable?
The number of students in a classroom
The height of students in a class
The time it takes to complete a race
The weight of a bag of rice
7
A discrete random variable can take on:
Only positive values
Any value in a normal distribution
Any value within an interval
A countable number of distinct values
8
If two coins are tossed once, which is NOT a possible value of the random variable for the number of heads?
2
1
3
0
9
The expected value of a random variable represents:
b) The weighted average of all possible outcomes
c) The maximum value of the variable
a) The most frequent outcome
d) The range of the distribution
10
Which of the following is a discrete random variable?
Voltage of car batteries
Length of wire ropes
Amount of paint used in repaintingthe building
Number of soldiers in the troop
11
What is a random variable?
A variable whose value depends on the outcome of a random event
A fixed value that never changes
A set of all possible outcomes of an experiment
A number that measures central tendency
12
The probability of a random variable taking a specific value is called:
b) The probability mass function (PMF)
d) The mean
a) The variance
c) The cumulative distribution function (CDF)
13
What's the probability of getting tails when flipping a fair coin?
1
0.25
0
0.5
14
It is a numerical quantity that is assigned to the outcome of an experiment.
probability distribution
random variable
probability
variable
15
A continuous random variable can take on:
c) Any value within a specified range
a) Only whole numbers
d) Only positive integers
b) A finite number of values
16
It is a process in making decisions in evaluating claims about a population.
Hypothesis testing
Alternative hypothesis
Null hypothesis
Test statistic
17
What shape is associated with a normal distribution?
Rectangular
Triangular
Bell curve
skewed
18
A sampling technique where members of population are listed, samples are selected in intervals called sample intervals
quota sampling
stratified random sampling
systematic sampling
lottery sampling
19
What is the mean of the data set: 2, 4, 6, 8, 10?
7
6
8
5
20
In a normal distribution, the mean, median, and mode are:
Unrelated
Randomly distributed
Different
The same
21
If a coin is flipped twice, what is the probability of getting two heads?
1/8
1/4
1/3
1/2
22
It is a subset taken from a population, either by random or nonrandom sampling techniques.
D. lottery samp
B. sample
A. population
C. random sampling
23
Which of the following is NOT an example of a continuous random variable?
b) The weight of a watermelon
d) The time taken to solve a math problem
c) The number of cars in a parking lot
a) The length of a car
24
It assumes that there is change, relationship, or the independent variable has an effect on the dependent variable
Hypothesis Testing
Alternative Hypothesis
Null Hypothesis
Test Statistic
25
The sum of all probabilities in a probability distribution must equal:
0
2
It depends on the type of random variable
1
26
How many ways are there in tossing two coins once?
1
2
4
3
