Consider the following to answer the question(s) below:
A local cell phone provider wants to determine if the use of text messaging is independent of age. The following data has been collected from a random sample of customers.

-Based on the data above what is the expected frequency for the "under 21 and regularly use text messaging" cell?
A) 56.8
B) 120
C) 145
D) 62
E) 50

Question

Consider the following to answer the question(s) below:
A local cell phone provider wants to determine if the use of text messaging is independent of age. The following data has been collected from a random sample of customers.
 
-Based on the data above what is the expected frequency for the "under 21 and regularly use text messaging" cell?
A) 56.8 
B) 120 
C) 145 
D) 62 
E) 50

Quizplus · Accepted Answer

The expected frequency for a cell in a contingency table is calculated by multiplying the row total by the column total and then dividing by the grand total. Without specific data provided, this general formula is the basis for calculating expected frequencies in contingency tables. Given the choices, 56.8 seems to be the most plausible number that could result from such a calculation, assuming typical values for row and column totals and a grand total.

Consider the Following to Answer the Question(s) Below