Statistics- When carrying out a large sample test of H0:m£ 10 vs. Ha:m > 10

QUESTION

Essay
Questions:
1. Test
H0:m £ 8 versus HA:m > 8, givena= 0.01,
n = 25, .0/msohtmlclip1/01/clip_image002.png”> = 8.13 and s = 0.3. Assume the sample is selected
from a normally distributed population.
2.Test H0: π = 0.25 versus HA: π¹ 0.25 with p = 0.33 and n = 100 at alpha
= 0.05 and 0.10.
3. Test
atα = 0.01 the hypothesis that a majority (more than 50%) of students
favor the plus/minus grading system at a university if in a random sample of
500 students, 285 favor the system?
Multiple
Choice:
4.When carrying out a large sample test of H0:m£ 10 vs. Ha:m
> 10 by using a critical value approach, we reject H0 at level of
significancea when the calculated test statistic is:
A. Less than za
B. Less than – za
C. Greater
than za
D. Greater than za/2
E. Less than the p value
5.
If you live in California, the decision to buy earthquake insurance is an
important one. A survey revealed that only 133 of 337 randomly selected
residences in one California county were protected by earthquake insurance.
Calculate the appropriate test statistic to test the hypothesis which leads to
the alternate hypothesis that less than 40% of the residents are protected by
earthquake insurance?
A. – 0.20
B. 0.40
C. -0.13
D. 0.20
E. -0.40

ANSWER:

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