Question

7.Are the following scenarios one-tail or two-tail tests? Explain why for each. a) If I don’t have enough money to pay the bill I’m going to look like a jerk on my big date. b) I’m handing out beer coupons and will get arrested if I give one to a minor. c) I’m distributing fliers for a new teen-oriented business in town and I don’t want to waste them on members of the wrong demographic. d) You’re placing a food order for your upcoming party and the food will be spoiled by the day after the party if it’s left over.8.Using the situations above, give the critical z-table value for each when paired with the following confidence intervals. a) 90%. b) 95%. c) 80%. d) 99%.

Answer 1

a) If I don’t have enough money to pay the bill I’m going to look like a jerk on my big date.

one should have enough amount of greater than that

one might have enough amount

hence it is one tailed

Critical value at 90% = 1.28

b) I’m handing out beer coupons and will get arrested if I give one to a minor

person should be more than 18

person should be equal or less than 18

hence it is one tailed

Critical value at 95% = 1.645

c) I’m distributing fliers for a new teen-oriented business in town and I don’t want to waste them on members of the wrong demographic

Person should lie between teenage

Person should not be below teenage or above teenage

hence it is two tailed test

Critical value at 80% = 1.28

d) You’re placing a food order for your upcoming party and the food will be spoiled by the day after the party if it’s left over

Food should be of exact requirememt

Food should not be less than required or more than required

hence it is two tailed test

Critical value at 99% = 2.576