Math 227 - Statistics » Winter 2021 » Quiz Sec 9.4

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Question #1
In a simple random sample of size 88, there were 22 individuals in the category of interest. It is desired to test Ho: p = 0.31 versus H1: p < 0.31. Compute the test statistic z.
A.   -1.22
B.   -1.23
C.   -1.11
Question #2
In a simple random sample of size 78, there were 20 individuals in the category of interest. It is desired to test Ho: p= 0.51 versus H1: p<0.51. Compute the sample proportion
A.   0.526
B.   0.265
C.   0.256
Question #3
In a simple random sample of size 78, there were 20 individuals in the category of interest. It is desired to test Ho: p= 0.51 versus H1: p<0.51. Compute the test statistics z.
A.   4.94
B.   -4.49
C.   4.49
Question #4
In a simple random sample of size 78, there were 20 individuals in the category of interest. It is desired to test Ho: p= 0.51 versus H1: p<0.51. Do you reject Ho at the 0.01 level?
A.   Yes
B.   No

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