A cell phone company wants to determine if the use of text messaging is independent of age.The follow data has been collected from a random sample of their customers. Using the data above,in order to test for the independence of age and the use of text messaging,the expected value for the "under 21 and regularly use text messaging" cell is 82.

Question

A cell phone company wants to determine if the use of text messaging is independent of age.The follow data has been collected from a random sample of their customers.  Using the data above,in order to test for the independence of age and the use of text messaging,the expected value for the "under 21 and regularly use text messaging" cell is 82.

Quizplus · Accepted Answer

The expected value for the "under 21 and regularly use text messaging" cell can be calculated using the formula:

Expected value = (row total x column total) / sample size

Plugging in the values from the given data, we get:

Expected value = (110 x 192) / 300 = 70.4

Therefore, the statement is false as the expected value is not 82.

A Cell Phone Company Wants to Determine If the Use