PLEASE HELP OUT!

1: (2 points) Is randomness helpful in a sample selection plan? Yes / No Reason: 2: (2 points) To generate a random telephone number in the US, would end-points would you use in the RANDBETWEEN function in Excel? Endpoints: and And, what do you do if Excel returns a number that is not a valid phone number, say, 1111111111 (not a valid area code or not assigned)? 3: (2 points) Relative to a one-step area sample, a two-step area sample will reduce sample selection error. Yes / No Reason: 4: (2 points) In a mall-intercept convenience sample, field workers are asked to get responses from 100 visitors. Rather than selecting visitors randomly, the field workers have freedom to pick. What bias is likely to arise? 5: (2 points) Is a quota sample an improvement over a convenience sample? Yes/ No Reason