1. For a 98% confidence interval for a population parameter, e.g., the populatio

Question

1. For a 98% confidence interval for a population parameter, e.g., the population mean, of all possible confidence intervals, how many will contain the true parameter value? Enter answer with 2 decimal places.

2.The population standard deviation is unknown. For a test of the population mean, what is the distribution of the test statistic?

3.

H0: 16.93 vs. HA: > 16.93

What is the test statistic for sample of size 20, mean 12.34, and standard deviation 2.61? Enter the test statistic with 2 decimal places.

4.It is claimed that is not 1800. A sample of size 50 yields a sample mean of 1895 and a sample standard deviation of 250. Test the appropriate hypothesis at = 0.05.

5.Test the claim 75 at = 0.10. A sample of size 76 yields a sample mean of 99 and a sample standard deviation of

Explanation / Answer

Dear student,

Due to Chegg guidelines only one question is answered.

2,

If, the standard deviation is unknown ,there are two cases:

1, if n>=30,the test is a large sample test and the test stastics follows normal N(0,1) distribution.

2, if n<30, the test is a small sample test and the test stastic is follows t distribution with (n-1) degrees of freedom.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.