Problem 10 Telephone lines A cell company claims that at least 15% of its customers have 2 or more l

Problem 10 Telephone lines

A cell company claims that at least 15% of its customers have 2 or more lines The company selects a random sample of 500 customers and finds that 65 have 2 or more telephone lines If ? = 002, show all key steps and test whether the proportion is less than 15% using the critical value approach [10 marks]