Question

In: Statistics and Probability

We are given that n=15, the sample mean Ῡ=2.5, the sample standard deviation s=1.5 and random...

We are given that n=15, the sample mean Ῡ=2.5, the sample standard deviation s=1.5 and random variable Y distributed Normal with mean µ and variance σ2, where both µ and σ2 are unknown and we are being concentrated on testing the following set of hypothesis about the mean parameter of the population of interest.

We are to test:

H0 : µ ≥ 3.0 versus H1 : µ < 3.0.

Compute the following:

a) P- value of the test

b)    Probability of making Type II error and the power of this test at µ= 2.0

Solutions

Expert Solution


Related Solutions

We are given that n=15, the sample mean Ῡ=2.5, the sample standard deviation s=1.5 and random...
We are given that n=15, the sample mean Ῡ=2.5, the sample standard deviation s=1.5 and random variable Y distributed Normal with mean µ and variance σ2, where both µ and σ2 are unknown and we are being concentrated on testing the following set of hypothesis about the mean parameter of the population of interest. We are to test: H0 : µ ≥ 3.0 versus H1 : µ < 3.0. Compute the following: a) P- value of the test b) Probability...
A random sample of n=100 observations produced a mean of x̅=33 with a standard deviation of s=5.
A random sample of n=100 observations produced a mean of x̅=33 with a standard deviation of s=5. (a) Find a 95% confidence interval for μ Lower-bound: Upper-bound: (b) Find a 99% confidence interval for μ Lower-bound: Upper-bound:
A random sample of n=100 observations produced a mean of x̅=28 with a standard deviation of s=6.
Note: Each bound should be rounded to three decimal places. A random sample of n=100 observations produced a mean of x̅=28 with a standard deviation of s=6. (a) Find a 90% confidence interval for ?Lower-bound:  Upper-bound: (b) Find a 99% confidence interval for ?Lower-bound:  Upper-bound: (c) Find a 95% confidence interval for ?Lower-bound:  Upper-bound:
A random sample of n=100 observations produced a mean of x̅=25 with a standard deviation of s=4.
A random sample of n=100 observations produced a mean of x̅=25 with a standard deviation of s=4. (a) Find a 90% confidence interval for μ, z for 90 percentile : 1.28 (b) Find a 95% confidence interval for μ, z for 95 percentile : 1.75 (c) Find a 99% confidence interval for μ, z for 99 percentile : 2.33
The mean and standard deviation of a random sample of n measurements are equal to 33.2...
The mean and standard deviation of a random sample of n measurements are equal to 33.2 and 3.6?, respectively. a. Find a 90?% confidence interval for mu if nequals81. b. Find a 90?% confidence interval for mu if nequals324. c. Find the widths of the confidence intervals found in parts a and b. What is the effect on the width of a confidence interval of quadrupling the sample size while holding the confidence coefficient? fixed?
The mean and standard deviation of a random sample of n measurements are equal to 33.6...
The mean and standard deviation of a random sample of n measurements are equal to 33.6 and 3.5, respectively. A) The 99% confidence interval for π if n = 49 is approximately ( ___ , ___ ) B) The 99% confidence interval π if n = 196 is approximately ( ___ , ___ )
The mean and standard deviation of a random sample of n measurements are equal to 33.5...
The mean and standard deviation of a random sample of n measurements are equal to 33.5 and 3.5, respectively. a. Find a 90% confidence interval for m if n = 144. b. Find a 90% confidence interval for m if n = 576. c. Find the widths of the confidence intervals found in parts a and b. What is the effect on the width of a confidence interval of quadrupling the sample size while holding the confidence coefficient fixed?
A population has mean μ = 16 and standard deviation σ = 1.5. A random sample...
A population has mean μ = 16 and standard deviation σ = 1.5. A random sample of size n = 49 is selected. What is the probability that the sample mean is greater than 16.8? I got 3.73 for z-value. Please help
From a random sample from normal population, we observed sample mean=84.5 and sample standard deviation=11.2, n...
From a random sample from normal population, we observed sample mean=84.5 and sample standard deviation=11.2, n = 16, H0: μ = 80, Ha: μ < 80.  State your conclusion about H0 at significance level 0.01. choices: A. Test statistic: t = 1.61. P-value = 0.9356. Reject the null hypothesis. There is sufficient evidence to conclude that the mean is less than 80. The evidence against the null hypothesis is very strong. B. Test statistic: t = 1.61. P-value = 0.0644. Do...
4 We draw a random sample of size 40 from a population with standard deviation 2.5....
4 We draw a random sample of size 40 from a population with standard deviation 2.5. Show work in excel with formulas a If the sample mean is 27, what is a 95% confidence interval for the population mean? b If the sample mean is 27, what is a 99% confidence interval for the population mean? c If the sample mean is 27, what is a 90% confidence interval for the population mean? d If the sample mean is 27...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT