The middle value in a sorted dataset

How do you calculate relative frequency?

Frequency ÷ sum of all frequencies

How do you calculate the mean of a dataset?

Add all values and divide by the number of values

What is the formula for class width?

(max – min) ÷ number of classes

What does expected value represent?

The average of outcomes weighted by probability

What is a random variable?

A numerical result of a random experiment

How do you calculate expected value?

Multiply each x by its probability and sum the results

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Statistics

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Questions 20

Answers

1
Which level of measurement involves data that can be ordered and has meaningful differences but no true zero?
Interval
Nominal
Ratio
Ordinal
2
What is the formula for midrange?
(min + max) ÷ 2
(frequency ÷ total) × 100
(mean + median) ÷ 2
(mode + range) ÷ 2
3
What is the median?
The difference between the highest and lowest
The middle value in a sorted dataset
The most frequent number
The first value in a set
4
What is an "event" in probability?
A random guess
The result of a formula
The most likely outcome
A set of possible outcomes
5
Which formula is used to find binomial probabilities?
P = x / N
C(n, x) * p^x * (1-p)^(n-x)
P = 1 – P(A)D) P = x / N
Mean = Σx / n
6
How do you calculate relative frequency?
Max – min
Frequency ÷ number of classes
Frequency ÷ sum of all frequencies
Total frequency × 100
7
Which term describes the number of times a data value occurs in a dataset?
Range
Frequency
Mode
Mean
8
What is the probability of rolling a 4 on a fair 6-sided die?
1/6
2/3
1/3
1/2
9
How do you calculate the mean of a dataset?
Add all values and divide by the number of values
Subtract the smallest from the largest
Multiply all numbers
Take the middle value
10
What is the formula for class width?
(max – min) ÷ number of classes
(sum of values) ÷ frequency
(mean – mode) ÷ median
(min – max) × number of classes
11
Which term refers to data that consists of names or labels?
Ordinal
Nominal
Ratio
Interval
12
What does a histogram represent?
Percentage comparisons
Categorical variables
Frequencies of data intervals
A scatterplot
13
What does expected value represent?
The average of outcomes weighted by probability
The maximum result
The number of trials
The most likely result
14
What is a sample in statistics?
The entire group being studied
A statistical error
A subset of the population
A type of data
15
If P(A) = 0.3, what is P(A')?
1.3
0.3
0.7
0.5
16
Which term represents the average of all data points?
Median
Mode
Mean
Range
17
What does the complement of an event represent?
All outcomes not in the event
The same event repeated
An impossible outcome
A certain event
18
What is a random variable?
An average outcome
A number representing probability
A count of experiments
A numerical result of a random experiment
19
How do you calculate expected value?
Take the square root of probabilities
Divide total by number of events
Multiply each x by its probability and sum the results
Add all x values
20
What type of data is represented by shoe sizes (e.g., 7, 8.5, 10)?
Nominal
Qualitative
Binary
Quantitative

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