13.In the statement of null hypothesis you will likely find which of the following.

a) A.<

b) B.+

c) C.=

d) D.>

15.If the level of significance (a) is 0.005 in a two tail test, how large is the nonrejection regin under the curve of the distribution ?

a) 0.9975

b) 0.995

c) 0.005

d) 0.050

17.Find Za/2 when a = .01

a) 1.96

b) 1.282

c) 2.576

d) 1.645

19.In simple random sample from a population of serval of hundreds that approximately normal ly distrubute the following data values were collected

68, 79 70, 98, 74, 79, 50, 102, 92, 96

Based on this information, the confidence level would be 90% that the population mean is somewhere between

a) 73. 36 and 88.24

b) 71.36 and 90.24

c) 69.15 and 92.45

d) 65.33 and 95.33