Question

The fellowing 3 peoblems Markce He changes the oil, boging each of the et 9 tanks of gas (Each of these anks of gas is one ot significantly changed afher his o change. The uill hopothesis is that there has been no change in 19. The test statistic for this samele is: a 1.2 h 1.4 c 1.6 d. 1.8 e. 20 20. For aqm10% two-ailed以the critical Na-are * a 1.64 b 1.86 e 1.96 d 2.08 21. For a 95% two-ailed test the margin oferror (ME) i£ a 2.22 b. 238 2.67 d. 2.89 e 327 serving. While the machine targets 6 ounces, there is some small variability from cup the machine is working properly, the standard deviation of the amount of cocoa in eac 5 ounces or less. A random sample of 15 cups from one machine is taken to determi working properly. Suppose a machine is operating exactly at a population standard σ= .5 ounces. It is unlikely that any particulr s that is also exactly s5. For instance, if o-5 appraximately what is the probabilin than 72 ounces? (Hint Which distribution to you need to use here?) 22. A certain brand of hot chocolate machine is supposed to dispense 6 ounce cups of coco sample of 15 will yield a sample stan a. .01 b. .02

Answer 1

19)

option D is correct

20)

critical z =1.64 ; option A is correct

21)

margin of error =1.96*1.6667 =3.27

option E

22) question is not complete in the picture