The frequency table shows the number of cars that 65 families have.
|Number of Cars||1||2||3||4|
Find the mean number of cars per family.
This data can be expressed as a probability distribution for the discrete random variable as shown. Find the value of , , , and .
Calculate the expected value of .
The table shows the probability distribution of a fair six-sided die. Determine .
The discrete random variable has the shown probability distribution.
Find the value of .
Hence, determine the expected value of .
An experiment produces the discrete random variable that has the probability distribution shown. If a very high number of trials were carried out, what would be the likely mean of all the outcomes?
Work out the expected value of the random variable whose probability distribution is shown.