What is the primary use of a bar chart?
Displaying the relationship between two continuous variables
Comparing values across different categories
Showing the distribution of a continuous variable
Representing parts of a whole
What is the probability of getting heads and then tails when flipping a fair coin twice?
1
3/4
1/4
1/2
The area under a probability distribution curve represents:
The total probability of all possible outcomes, which always equals 1
The standard deviation of the distribution
The mean of the distribution
The probability of a specific value occurring
Which of the following is NOT a characteristic of a normal distribution?
Bell-shaped and symmetrical
The total area under the curve equals 1
Asymmetry with a longer tail on one side
Mean, median, and mode are equal
Which of the following is NOT affected by outliers?
Median
Range
Standard Deviation
Mean
The mean of a dataset is 15 and the standard deviation is 3. What percentage of data points lie within 12 and 18?
Cannot be determined from the given information
Approximately 99.7%
Approximately 95%
Approximately 68%
The 25th percentile is also known as the:
Second Quartile
Interquartile Range
First Quartile
Third Quartile
A box plot can help identify which of the following in a dataset?
Causation
Correlation
Outliers
Which type of chart is particularly useful for comparing the distribution of a variable across different categories?
Box Plot
Scatter Plot
Histogram
Pie Chart
The probability of an event happening is 0.3. What is the probability of the event NOT happening?
0.6
0.3
0.7