answer part b

10.2.9 Use the contingency table below to calculate the marginal frequencies and find the expected frequency for each cell in the contingency table. Assume that the variables are independent. Preference Bank employee New procedure Old procedure No preference Teller 18 23 12 Customer service 22 10 56 representative (a) Calculate the marginal frequencies and sample size. Preference Bank employee New procedure Old procedure No preference Total Teller 18 23 12 53 Customer service 22 10 56 88 representative Total 40 33 68 141 (b) Find the expected frequency for each cell in the contingency table. (Round to two decimal places as needed.) Preference Bank employee New procedure Old procedure No preference Teller Customer service representative X