Question

n = 23 H0: σ2 ≥ 66 s2 = 60 Ha: σ2 < 66 If the...

n = 23 H0: σ2 ≥ 66 s2 = 60 Ha: σ2 < 66 If the test is to be performed at 95% confidence, the critical value(s) from the table is(are) _____. a. 33.9244 b. 12.3380 c. 43.7729 d. 10.9823 and 36.789

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

Homework Answers

Answer #1

We have here,

Sample size =n=23

Degree of freedom =n-1=23-1=22

Chi square critical value for left tailed test =12.3380..............by using table or Excel =CHIINV(1-0.05,22)

b. 12.3380

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
Consider the following. n = 22, x = 126.4, s2 = 21.7, Ha: σ2 > 15,...
Consider the following. n = 22, x = 126.4, s2 = 21.7, Ha: σ2 > 15, α = 0.05 Test H0: σ2 = σ02 versus the given alternate hypothesis. State the test statistic. (Round your answer to two decimal places.) χ2 =   State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to two decimal places.) χ2 >   χ2 <   Construct a (1 − α)100% confidence interval for σ2 using the χ2...
Consider the following. n = 22, x = 126.2, s2 = 21.5, Ha: σ2 > 15,...
Consider the following. n = 22, x = 126.2, s2 = 21.5, Ha: σ2 > 15, α = 0.05 Test H0: σ2 = σ02 versus the given alternate hypothesis. State the test statistic. (Round your answer to two decimal places.) χ2 = State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to two decimal places.) χ2 > χ2 < Construct a (1 − α)100% confidence interval for σ2 using the χ2...
Suppose we have a random sample of size 50 from a N(μ,σ2) PDF. We wish to...
Suppose we have a random sample of size 50 from a N(μ,σ2) PDF. We wish to test H0: μ=10 versus H1: μ=10. The sample moments are x ̄ = 13.4508 and s2 = 65.8016. (a) Find the critical region C and test the null hypothesis at the 5% level. What is your decision? (b) What is the p-value for your decision? (c) What is a 95% confidence interval for μ?
Consider the following hypotheses: H0: σ2 = 210 HA: σ2 ≠ 210 Find the p-value based...
Consider the following hypotheses: H0: σ2 = 210 HA: σ2 ≠ 210 Find the p-value based on the following sample information, where the sample is drawn from a normally distributed population. a. s2= 281; n = 34 The p-value is___________. p-value  0.10 0.05  p-value < 0.10 0.02  p-value < 0.05 0.01  p-value < 0.02 p-value < 0.01 b. s2= 139; n = 34 The p-value is___________. p-value  0.10 0.05  p-value < 0.10 0.02  p-value < 0.05 0.01  p-value < 0.02 p-value < 0.01 c. Which of the above...
n = 36 = 24.06 S = 12 H0: μ 20 Ha: μ > 20 If...
n = 36 = 24.06 S = 12 H0: μ 20 Ha: μ > 20 If the test is done at 95% confidence, the null hypothesis should Select one: A. not be rejected B. be rejected C. Not enough information is given to answer this question. D. None of these alternatives is correct.
Consider the following hypotheses: H0: μ = 23 HA: μ ≠ 23 The population is normally...
Consider the following hypotheses: H0: μ = 23 HA: μ ≠ 23 The population is normally distributed. A sample produces the following observations: (You may find it useful to reference the appropriate table: z table or t table) 26 25 23 27 27 21 24 a. Find the mean and the standard deviation. (Round your answers to 2 decimal places.) Mean    Standard Deviation b. Calculate the value of the test statistic. (Round intermediate calculations to at least 4 decimal...
Consider the following competing hypotheses: Use Table 2. H0: μD ≥ 0; HA: μD < 0...
Consider the following competing hypotheses: Use Table 2. H0: μD ≥ 0; HA: μD < 0 d-bar = −2.3, sD = 7.5, n = 23 The following results are obtained using matched samples from two normally distributed populations: a. At the 10% significance level, find the critical value(s). (Negative value should be indicated by a minus sign. Round intermediate calculations to 4 decimal places and final answer to 2 decimal places.)   Critical value    b. Calculate the value of the...
Suppose we have a random sample of size 50 from a N(μ,σ2) PDF. We wish to...
Suppose we have a random sample of size 50 from a N(μ,σ2) PDF. We wish to test H0: μ=10 versus H1: μ=10. The sample moments are x ̄ = 13.4508 and s2 = 65.8016. (a) Test the null hypothesis that σ2 = 64 versus a two-sided alternative. First, find the critical region and then give your decision. (b) (5 points) Find a 95% confidence interval for σ2? (c) (5 points) If you are worried about performing 2 statistical tests on...
A random sample of size n=25 from N(μ, σ2=6.25) yielded x=60. Construct the following confidence intervals...
A random sample of size n=25 from N(μ, σ2=6.25) yielded x=60. Construct the following confidence intervals for μ. Round all your answers to 2 decimal places. a. 95% confidence interval: 95% confidence interval = 60 ± ? b. 90% confidence interval: 90% confidence interval = 60 ± ? c. 80% confidence interval: 80% confidence interval = 60 ± ?
Consider the following hypotheses: H0: μ = 110 HA: μ ≠ 110    The population is...
Consider the following hypotheses: H0: μ = 110 HA: μ ≠ 110    The population is normally distributed with a population standard deviation of 63. Use Table 1.     a. Use a 1% level of significance to determine the critical value(s) of the test. (Round your answer to 2 decimal places.)       Critical value(s) ±        b-1. Calculate the value of the test statistic with x−x− = 133 and n = 80. (Round your answer to 2 decimal places.)    ...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT