Statistical Reasoning and Probability Flashcards
6 cards from real AQL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Statistical Reasoning and Probability flashcards as text
What does the 'mean' of a data set represent?
Answer: The arithmetic average, calculated by dividing the sum of all values by the number of values
The mean is calculated by adding all values together and dividing by the total count of values, representing the data's arithmetic center.
What is the 'median' of the data set: 3, 7, 8, 12, 15?
Answer: 8
When the five values are arranged in order (3, 7, 8, 12, 15), the middle (third) value is 8, which is the median.
A data set has values: 4, 4, 5, 7, 9, 9, 9. What is the mode?
Answer: 9
The mode is the value that appears most frequently in the data; 9 appears three times, more than any other value.
What does a 'large standard deviation' indicate about a data set?
Answer: The data points are spread widely from the mean
A large standard deviation means there is high variability in the data—the values are spread far from the average.
If you roll a fair six-sided die, what is the probability of rolling a number greater than 4?
Answer: 1/3
Numbers greater than 4 on a six-sided die are 5 and 6—that's 2 favorable outcomes out of 6 total, giving a probability of 2/6 = 1/3.
What is the range of the data set: 14, 22, 7, 31, 19?
Answer: 24
Range = maximum − minimum = 31 − 7 = 24.