Elementary Statistics - One Line Questions
1.
The probability of an event occurring is a value between: —
0 and 1 (inclusive)
2.
If a dataset is {1, 2, 3, 4, 5}, what is the median? —
3
3.
Calculate the range of the dataset: 15, 8, 22, 10, 18. —
14
4.
If a dataset is {1, 2, 2, 3, 4, 4, 4, 5}, what is the mode? —
4
5.
What is the variance of the dataset: 2, 4, 6, 8? —
6.25
6.
What is the standard deviation of the dataset: 2, 4, 6, 8? —
2.5
7.
What is the mean of the dataset: 10, 20, 30, 40, 50? —
30
8.
What is the median of the dataset: 2, 5, 1, 8, 3? —
3
9.
What is the mode of the dataset: 3, 5, 3, 7, 5, 3, 8? —
3
10.
What is the first quartile (Q1) of the dataset: 1, 3, 5, 7, 9, 11, 13? —
5
11.
What is the third quartile (Q3) of the dataset: 1, 3, 5, 7, 9, 11, 13? —
9
12.
What is the interquartile range (IQR) of the dataset: 1, 3, 5, 7, 9, 11, 13? —
6
13.
What does a histogram graphically represent? —
A bar chart showing frequencies of continuous data
14.
Variance is calculated as the average of the: —
Squared deviations from the mean
15.
Which statistical concept deals with collecting, organizing, analyzing, and interpreting data? —
Statistics
16.
The mode of a dataset is the value that: —
Appears most often
17.
Quantitative data represents amounts that can be measured numerically. Which of the following is an example of quantitative data? —
Age
18.
Qualitative data describes qualities or characteristics that cannot be measured numerically. Which of the following is an example of qualitative data? —
Color
19.
Which type of graph uses bars to represent the frequency of data points falling within specific intervals? —
Histogram
20.
A dataset shows that 60% of the observations are below a certain value. This value represents the: —
60th percentile
21.
When dealing with ordinal data (data that can be ranked but not precisely measured), which measure of central tendency is most appropriate? —
Mode
22.
Which measure indicates the spread or dispersion of a dataset? —
Variance
23.
Which of the following is a measure of dispersion? —
Range
24.
Which of the following is NOT a measure of central tendency? —
Standard Deviation
25.
Which statistical measure is used to summarize a dataset by a single value that best represents the center of the data? —
Measures of Central Tendency
26.
The sum of all observations divided by the number of observations is known as the: —
Mean
27.
Which measure of central tendency is most affected by outliers? —
Mean
28.
The first quartile (Q1) is also known as the: —
25th percentile
29.
The third quartile (Q3) is also known as the: —
75th percentile
30.
If all outcomes in a sample space are equally likely, the probability of an event is calculated as: —
Number of favorable outcomes / Total number of outcomes
31.
In a dataset, the median is the value that: —
Divides the dataset into two equal halves when arranged in order
32.
In statistics, 'data' refers to: —
Facts and figures collected for analysis
33.
Which of the following is NOT a measure of dispersion? —
Mean
34.
Which measure represents the central tendency of a dataset? —
Mean
35.
The square root of the variance is called the: —
Standard Deviation
36.
In a negatively skewed distribution, the tail is longer on the: —
Left side
37.
The entire group of individuals or items that we are interested in studying is called the: —
Population
38.
A dataset where the mean, median, and mode are approximately equal is considered: —
Symmetric
39.
If the tail of a distribution is longer on the right side, the distribution is said to be: —
Positively skewed
40.
A sample is: —
A subset of the population
41.
The interquartile range (IQR) is the difference between: —
The third quartile (Q3) and the first quartile (Q1)
42.
If a dataset has no repeating values, what can be said about its mode? —
The mode is undefined or all values are modes.
43.
A frequency distribution table shows: —
The number of times each value or range of values occurs
44.
The range of a dataset is defined as: —
The difference between the highest and lowest values
45.
In a frequency table, the 'frequency' column indicates: —
The number of times a particular value or range of values appears
46.
What is the purpose of calculating standard deviation? —
To measure the typical deviation of data points from the mean
47.
What is the primary purpose of elementary statistics? —
To interpret and analyze data
48.
What is the purpose of a scatter plot? —
To visualize the relationship between two numerical variables
49.
A pie chart is best used to represent: —
Proportions of a whole
50.
Quartiles divide a dataset into how many equal parts? —
Four