Random variables
Explain the significance of expected value in probability.
Random variables
Define discrete and continuous random variables. Give examples of each.
Histogram and Ogive
What is an ogive? How do you construct it from a cumulative frequency table?
Histogram and Ogive
Construct a histogram for the following data:
Class intervals: 0-10, 10-20, 20-30
Frequencies: 4, 6, 5
Cumulative frequency
How do you represent cumulative frequency graphically? Describe the steps.
Cumulative frequency
Create a cumulative frequency table from the following data: 10, 15, 20, 25, 30.
Probability
What is the probability of flipping a coin and getting heads? Explain your reasoning.
Probability
If you draw a card from a standard deck of 52 cards, what is the probability of drawing a heart?
Measures of dispersion
Explain how to find the variance of a data set. Calculate the variance for: 2, 4, 6, 8.
Measures of dispersion
Define range. Calculate the range for the data set: 18, 22, 15, 30, 25.
