In a deck of 52 cards, what is the probability of drawing a heart, given that you know the card is red?
1/4
1/13
1/2
1/52
What does a variance of zero indicate about a dataset?
The data is perfectly normally distributed.
The mean is zero.
The dataset has a large amount of variation.
All data points are the same.
If a distribution is skewed to the right, what is the relationship between the mean and the median?
The relationship cannot be determined.
Mean is equal to the median.
Mean is less than the median.
Mean is greater than the median.
If the range of a dataset is 20, and the smallest value is 5, what is the largest value?
20
15
25
Cannot be determined
The 25th percentile is also known as the:
Second Quartile
First Quartile
Third Quartile
Interquartile Range
Which type of chart is particularly useful for comparing the distribution of a variable across different categories?
Scatter Plot
Box Plot
Pie Chart
Histogram
Drawing a card from a deck and then drawing another card without replacing the first is an example of:
Independent events
Mutually exclusive events
Complementary events
Dependent events
What type of chart is best for displaying the distribution of a single continuous variable?
Bar Chart
The mean of a dataset is 15 and the standard deviation is 3. What percentage of data points lie within 12 and 18?
Approximately 95%
Cannot be determined from the given information
Approximately 68%
Approximately 99.7%
Which of the following is NOT a characteristic of a normal distribution?
The total area under the curve equals 1
Bell-shaped and symmetrical
Mean, median, and mode are equal
Asymmetry with a longer tail on one side