an analyst at a local bank wonders if the age distribution of customers coming for service at his branch in town is the same as at the branch located near the mall. He selects 100 transactions at random from each bank and researches the age information for the associated customers. Use the accompanying table below to complete parts a theough g

less than 30 30-55 56 or older total

in town branch 20 42 38 100

mall branch 30 48 22 100

Total 50 90 60 200

a. what are the null and alternative hypothesis

b what type of test is this

chi square goodness of fit

chi square test of homogeneity

chi-square test of indendence

c. what are the expected values

less that 30 _________ in town 30--55________in town 56 or older_______in town

mall branch mall branch _________mall branch

d. find X2 statistic_____________

e. How many degress of freedom does the x2 statistic have_________

f. find the critical value at a=0.05

X2=____________