Question: Over the last 3 years Art s Supermarket has observed the
Over the last 3 years, Art’s Supermarket has observed the following distribution of modes of payment in the express lines: cash (C) 41%, check (CK) 24%, credit or debit card (D) 26%, and other (N) 9%. In an effort to make express checkout more efficient, Art’s has just begun offering a 1% discount for cash payment in the express checkout line. The following table lists the frequency distribution of the modes of payment for a sample of 500 express-line customers after the discount went into effect.
Test at a 1% significance level whether the distribution of modes of payment in the express checkout line changed after the discount went into effect.
Answer to relevant QuestionsHome Mail Corporation sells products by mail. The company’s management wants to find out if the number of orders received at the company’s office on each of the 5 days of the week is the same. The company took a sample ...Explain how the expected frequencies for cells of a contingency table are calculated in a test of independence or homogeneity. How do you find the degrees of freedom for such tests? The game show Deal or No Deal involves a series of opportunities for the contestant to either accept an amount of money from the show’s banker or to decline it and open a specific number of briefcases in the hope of ...Determine the value of x2 for 14 degrees of freedom and an area of .10 in the left tail of the chisquare distribution curve. An auto manufacturing company wants to estimate the variance of miles per gallon for its auto model AST727. A random sample of 22 cars of this model showed that the variance of miles per gallon for these cars is .62. Assume ...
Post your question