Question

3. Find the T value for a sample of 25 individuals who have a sample mean...

3. Find the T value for a sample of 25 individuals who have a sample mean of x̅ = 34, sample standard deviation of Sx = 4 relative to a population with a mean of μ = 38. Is this sample significantly different (using a 2 tailed test with alpha set at .05) from the sample with a mean of μ = 38?

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

Homework Answers

Answer #1

The test statistic is

  

  

At = 0.05, the critical values are +/- t0.025,24 = +/- 2.064

Since the test statistic value is less than the lower critical value (-5 < -2.064), so we should reject the null hypothesis.

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
27. A. In a certain sample of workers, the correlation between years of education and income...
27. A. In a certain sample of workers, the correlation between years of education and income earned is .60. The sample standard deviation in years of education is Sx = 2.1 years and the sample standard deviation in income is Sy = 23,000 dollars. The average income is 45000 dollars and the average years of education is 4. What is the regression equation for predicting income from education? . BFind the T value for a sample of 25 individuals who...
A random sample is selected from a normal population with a mean of μ = 20...
A random sample is selected from a normal population with a mean of μ = 20 and a standard deviation of σ =5 10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 25. If the sample consists of n = 25 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with alpha = .05.
A sample of n = 16 individuals is randomly selected from a population with a mean...
A sample of n = 16 individuals is randomly selected from a population with a mean of μ = 65, and a treatment is administered to the individuals in the sample. After treatment, the sample mean is found to be M = 73. (a) If the sample standard deviation is s = 11, are the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with α = 0.05? (Round your answers to three decimal...
A sample of 37 observations is selected from a normal population. The sample mean is 25,...
A sample of 37 observations is selected from a normal population. The sample mean is 25, and the population standard deviation is 5. Conduct the following test of hypothesis using the .05 significance level. H0 : μ ≤ 24 H1 : μ > 24 (a) Is this a one- or two-tailed test? "One-tailed"-the alternate hypothesis is greater than direction. "Two-tailed"-the alternate hypothesis is different from direction. (b) What is the decision rule? (Round your answer to 2 decimal places.) H0,when...
A random sample is selected from a normal popula-tion with a mean of μ = 40...
A random sample is selected from a normal popula-tion with a mean of μ = 40 and a standard deviation of σ = 10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 46. How large a sample is necessary for this sample mean to be statistically significant? Assume a two-tailed test with alpha = .05.
20. If a diagnostic blood test for HIV, if you divided all the individuals who actually...
20. If a diagnostic blood test for HIV, if you divided all the individuals who actually have HIV by the total number of individuals in the sample, you would be calculating the __________________________________________________ 21. If population I had P1 = 0.50 and population II had P2 = 0.30 and n1 = 60 & n2=30), then the sampling distribution for the difference between two sample proportions would have a mean equal to __________ and a variance equal to ______________ (what values?)?...
A sample mean, sample standard deviation, and sample size are given. Use the one-mean t-test to...
A sample mean, sample standard deviation, and sample size are given. Use the one-mean t-test to perform the required hypothesis test about the mean, μ, of the population from which the sample was drawn. Use the critical-value approach. , , n = 11, H0: μ = 18.7, Ha: μ ≠ 18.7, α = 0.05 Group of answer choices Test statistic: t = 1.03. Critical values: t = ±2.201. Do not reject H0. There is not sufficient evidence to conclude that...
A sample of 46 observations is selected from a normal population. The sample mean is 39,...
A sample of 46 observations is selected from a normal population. The sample mean is 39, and the population standard deviation is 9. Conduct the following test of hypothesis using the 0.10 significance level. H0 : μ ≤ 38 H1 : μ > 38 a. Is this a one- or two-tailed test? (Click to select) (One-tailed test / Two-tailed test) b. What is the decision rule? (Round the final answer to 3 decimal places.) (Click to select) (Reject / Accept)  H0...
Explain the general concept of a t value, and how it is different from a mean...
Explain the general concept of a t value, and how it is different from a mean and the standard error. Imagine you obtained a t-value with an associated p-value of .25. Explain what this means. Imagine the critical t value for a particular test was 2.6. What does the critical t-value mean (assuming alpha = 0.05 and the test is two-tailed) Explain the differences between a one-sample and paired-sample t-test
3. Suppose the population mean is hypothesized to be 368 with a population standard deviation of...
3. Suppose the population mean is hypothesized to be 368 with a population standard deviation of 13. Sample data is obtained to test this hypothesis (n=36, the sample mean is 373). a) Set up the two-tailed hypothesis test. b) Test the hypothesis using the .01 level of significance. Also test at the .05 level of significance. c) Interpret the results.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT