Showing top 8 worksheets in the category - Frequency Table Probability. Some of the worksheets displayed are Simple probability, Probability conditional and two way tables, Frequency distribution work, Two way tables and probability, Ch 2 frequency distributions and graphs, 15a 15b 15c 15d 15e relative frequency and probability, 6th grade lesson plan probably probability, Conditional ...1. The relative frequency is used to estimate the probability of an event. 2. The relative frequency, usually expressed as a decimal, is a fi gure that represents how often an event has occurred. 3. The relative frequency is calculated using the formula: Relative frequency = number of times an event has occured number of trials 4.Use a histogram worksheet to set up the histogram. It will help you determine the number of bars, the range of numbers that go into each bar, and the labels for the bar edges. After calculating W in Step 2 of the worksheet, use your judgment to adjust it to a convenient number. For example, you might decide to round 0.9 to an even 1.0. When we used two-way tables in the Exploratory Data Analysis (EDA) section, it was to record values of two categorical variables for a concrete sample of individuals. In contrast, the information in a probability two-way table is for an entire population, and the values are rather abstract.