Question

A random sample of 20 observations produced a sample mean of 9.5. Find the critical and...

  1. A random sample of 20 observations produced a sample mean of 9.5. Find the critical and observed z-values for each of the following and test each hypothesis at α = 0.05. Write a separate conclusion for each hypothesis. The underlying population standard deviation is known to be 3.5 and the population distribution is normal (5 points):

    1. H0: µ = 8.75; H1: µ ≠ 8.75

    2. H0: µ = 8.75; H1: µ > 8.75

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A random sample of 115 observations produced a sample mean of 32. Find the critical and...
A random sample of 115 observations produced a sample mean of 32. Find the critical and observed values of z for the following test of hypothesis using α=0.025. The population standard deviation is known to be 6 and the population distribution is normal. H0: μ=28 versus H1: μ>28. Round your answers to two decimal places.
A random sample of 102 observations produced a sample mean of 30. Find the critical and...
A random sample of 102 observations produced a sample mean of 30. Find the critical and observed values of z for the following test of hypothesis using α=0.01. The population standard deviation is known to be 8 and the population distribution is normal. H0: μ=28 versus H1: μ≠28. Round your answers to two decimal places. zcritical left = zcritical right = zobserved =
A random sample of 101 observations produced a sample mean of 33. Find the critical and...
A random sample of 101 observations produced a sample mean of 33. Find the critical and observed values of z for the following test of hypothesis using α=0.02. The population standard deviation is known to be 6 and the population distribution is normal. H0: μ=28 versus H1: μ≠28. Round your answers to two decimal places. zcritical left = zcritical right = zobserved =
A random sample of 430 observations produced a sample proportion equal to 0.34. Find the critical...
A random sample of 430 observations produced a sample proportion equal to 0.34. Find the critical and observed values of z for the following test of hypotheses using a=0.02. H0:p=.30 versus H1:p/=0.30 Round your answers to two decimal places. zcritical left =_____ zcritical right =_____ zobserved =__________
A random sample of 17 observations taken from a population that is normally distributed produced a...
A random sample of 17 observations taken from a population that is normally distributed produced a sample mean of 42.4 and a standard deviation of 8. Find the range for the p-value and the critical and observed values of t for each of the following tests of hypotheses using, α=0.01. Use the t distribution table to find a range for the p-value. Round your answers for the values of t to three decimal places. a. H0: μ=46 versus H1: μ<46....
A random sample of 27 observations taken from a population that is normally distributed produced a...
A random sample of 27 observations taken from a population that is normally distributed produced a sample mean of 58.5 and a standard deviation of 7.5. Find the range for the p-value and the critical and observed values of t for the following test of hypothesis, using α=0.01. H0: μ=55 versus H1: μ>55. Use the t distribution table to find a range for the p-value. Round your answers for the values of t to three decimal places. Enter your answer;...
Suppose that we wish to test H0: µ = 20 versus H1: µ ≠ 20, where...
Suppose that we wish to test H0: µ = 20 versus H1: µ ≠ 20, where σ is known to equal 7. Also, suppose that a sample of n = 49 measurements randomly selected from the population has a mean of 18. Calculate the value of the test statistic Z. By comparing Z with a critical value, test H0 versus H1 at α = 0.05. Calculate the p-value for testing H0 versus H1. Use the p-value to test H0 versus...
A sample of n=33 observations has a sample mean of 2.879. If an assumed known population...
A sample of n=33 observations has a sample mean of 2.879. If an assumed known population standard deviation σ = 0.325 is used, calculate the p-value for the testing of hypotheses. (a) H0 : µ = 3.0 vs. Ha : µ is not = to 3.0 (b) H0 : µ ≥ 3.5 vs. Ha : µ < 3.5
1. In order to test H0: µ=40 versus H1: µ > 40, a random sample of...
1. In order to test H0: µ=40 versus H1: µ > 40, a random sample of size n=25 is obtained from a population that is known to be normally distributed with sigma=6. . The researcher decides to test this hypothesis at the α =0.1 level of significance, determine the critical value. b. The sample mean is determined to be x-bar=42.3, compute the test statistic z=??? c. Draw a normal curve that depicts the critical region and declare if the null...
A sample of 35 observations is selected from a normal population. The sample mean is 20,...
A sample of 35 observations is selected from a normal population. The sample mean is 20, and the population standard deviation is 2. Conduct the following test of hypothesis using the 0.05 significance level. H0: μ ≤ 19 H1: μ > 19 Interpret the p-value? (Round your final answer to 2 decimal places.)
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT