In conjunction with the hous the housing foreclosure crisis, many economists expressed increasing concern about the level of credit card debt and efforts of banks to raise interest rates on these cards. The banks claimed the increases were justified. A government sub-committee decided to determine if the average credit card balance depends on the type of credit card used. Under consideration are four credit cards. The sample sizes to be used for each level are 26, 23, 25, and 22, respectively. Complete parts a through f below. a. Describe the parameter of interest for this analysis. Choose the correct answer below. A. The type of credit credit card held by credit card customers B. The average credit card balance of card holders of the four credit cards O C. The standard deviation of credit card balances of card holders of the four credit cards O D. The four types of credit cards under examination b. Determine the factor associated with this experiment. Choose the correct answer below. O A. The four types of credit cards under examination O B. The average credit card balance of card holders of the four credit cards C. The type of credit credit card held by credit card customers O D. The standard deviation of credit card balances of card holders of the four credit cards c. Describe the levels of the factor associated with this analysis. Choose the correct answer below. A. The type of credit credit card held by credit card customers B. The four types of credit cards under examination O C. The average credit card balance of card holders of the four credit cards O D. The standard deviation of credit card balances of card holders of the four credit cards d. State the number of degrees of freedom available for determining the between-samples variation