An analyst at a local bank wonders if the age distribution of customers coming for servicC3:AC13e at his branch in town is the same as at a branch located near the mall. He selects 100 transactions at random from each branch and researches the age information for the associated customer. These are the data :
		Age
	less than 30	30-55	56 or older	Total
In town	25	37	38	100
mall	30	48	22	100
Total	55	85	60	200
What is the null hypothesis if you want to check if the age patterns of customers are independent of bank location?
There is no significant difference between the age group of customers and bank location.
What are the expected numbers for each cell in a 3 by 3 table if the null hypothesis is true?
		Age
	less than 30	30-55	56 or older	Total
In town
mall
Total
Use the chi square test to accept or reject the null hypothesis. What is the chi square test statistic?
What is the chi square critical value and how many degrees of freedom does it have? Assume alpha is .05.