Question
Please, Help with these. It is urgent. Thank you. 1- H0: 16.56 vs. HA: > 16.56. What is the test statistic for sample of size
Please, Help with these. It is urgent. Thank you.
1- H0: 16.56 vs. HA: > 16.56. What is the test statistic for sample of size 30, mean 11.56, and standard deviation 2.99? Enter the test statistic with 2 decimal places.
2- A sample of size 20 yields a sample mean of 23.5 and a sample standard deviation of 4.3. Test HO: Mean 25 at a=0.10. HA: Mean < 25. This is a one-tailed test with lower reject region bounded by a negative critical value.
a) None of the other answers are correct.
b) Pvalue 0.932. HO not rejected. Conclude mean 25 plausible.
c) Pvalue 0.068. HO rejected. Conclude mean < 25
d) Pvalue 0.135. HO not rejected. Conclude mean 25 plausible.
3- The results of sampling independent populations:
Sample 1 from population 1
- Mean 80
- population variance 3
- sample size 25
Sample 2 from population 2
Mean 81
population variance 2
sample size 50
Note that the population variance are known. Test HO: (population 1 mean- population2 mean) 0 at a=0.05. HA: (population 1 mean - population2 mean)
>0. This is a one-tailed test with upper reject region and positive critical value.
4- The results of sampling independent populations:
Sample 1 from population 1
- Mean 1000
- sample standard deviation 400
- sample size 50
Sample 2 from population 2
Mean 1250
Sample standard deviation 500
sample size 75
Test the HO:population 1 mean= population2 mean at a=0.01. HA: population1 mean # population2 mean. This is a two-tailed test with both a negative lower critical value and a positive upper critical value. Separate variances is assumed.
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