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 sample is randomly selected from a population with a mean of μ = 50, and...
A sample is randomly selected from a population with a mean of μ = 50, and a treatment is administered to the individuals in the sample. After treatment, the sample is found to have a mean of M = 56 with a standard deviation of s = 8. If there are n = 4 individuals in the sample, are the data sufficient to reject Ho and conclude that the treatment has a significant effect using a two-tailed test with =...
14. Calculate the critical t-value(s) for each of the given hypothesis test scenarios below. If mulitple...
14. Calculate the critical t-value(s) for each of the given hypothesis test scenarios below. If mulitple critical values exist for a single scenario, enter the solutions using a comma-separated list. Round t-values to four decimal places. Find the critical t-value(s) for a left-tailed test of hypothesis for a mean, assuming the population standard deviation is unknown, with a sample size of 25 and let α=0.005. t= Find the critical t-value(s) for a right-tailed test of hypothesis for a mean, assuming...
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.
A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly...
A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 165 (µ = 165). The sample of 30 individuals who take Atenolol have an average (mean) systolic blood pressure of 147, with a sample standard deviation of 6. On the basis of these data, can the...
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?)?...
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
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT