Julie is trying to decide whether or not to start a chess Club at Creekland. She asks each of her friends whether they would like to be a part of the chess club of the 15 friends she asks, 12 of them say that they would join a chess club. What is a reasonable prediction for Julie to make?
A. Approximately 1600 out of the 2,000 students at Creekland would be interested in joining the chess club
O B. Approximately 160 of the 2,000 students at Creekland would be interested in joining the chess club,
O
C. Julie should not start a chess club because 12 people is not enough to create a club with
O D. Julie can not use the data she gathered because her sample does not represent the population

Atechnician compares repair costs for two types of microwave ovens (type i and type ii). he believes that the repair cost for type i ovens is greater than the repair cost for type ii ovens. a sample of 6767 type i ovens has a mean repair cost of $79.79$⁢79.79. the population standard deviation for the repair of type i ovens is known to be $19.18$⁢19.18. a sample of 5555 type ii ovens has a mean repair cost of $75.24$⁢75.24. the population standard deviation for the repair of type ii ovens is known to be $21.40$⁢21.40. conduct a hypothesis test of the technician's claim at the 0.050.05 level of significance. let μ1μ1 be the true mean repair cost for type i ovens and μ2μ2 be the true mean repair cost for type ii ovens. step 2 of 4 : compute the value of the test statistic. round your answer to two decimal places.