A call centre recorded the duration of each phone call an employee made during a day. The results are shown on the following histogram.
Complete the frequency table.
Length of calls
What is the total number of minutes spent on phone calls?
What is the probability that a call, chosen at random, has a duration of $7$7 minutes? Give your answer as a percentage correct to two decimal places.
S7-4 Investigate situations that involve elements of chance: A comparing theoretical continuous distributions, such as the normal distribution, with experimental distributions B calculating probabilities, using such tools as two-way tables, tree diagrams, simulations, and technology.
Apply probability methods in solving problems