Question

A random sample of Ohio cemeteries shows that the average age at death of Revolutionary War...

A random sample of Ohio cemeteries shows that the average age at death of Revolutionary War veterans is 67 years (n = 25, s = 7). Another such random sample showed that the average age at death for Civil War veterans who survived the war is 48 years (n = 78, s = 10). Find the 95% confidence interval estimating the population difference between the age at death of these two groups of veterans assuming not equal variances

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 20 students at a university showed an average age of 20.9 years...
A random sample of 20 students at a university showed an average age of 20.9 years and a sample standard deviation of 2.5 years. The 98% confidence interval for the true average age of all students in the university is? Enter in the upper limit of your confidence interval.
A random sample of 20 students at a university showed an average age of 21.5 years...
A random sample of 20 students at a university showed an average age of 21.5 years and a sample standard deviation of 2.8 years. The 98% confidence interval for the true average age of all students in the university is? Enter in the upper limit of your confidence interval. ( round to 4 decimal places)
A random sample of 36 staff members at a local hospital showed an average age of...
A random sample of 36 staff members at a local hospital showed an average age of 25 years. Ages of the staff at the hospital are normally distributed with a population standard deviation of 1.8 years. The 98% confidence interval for the average age of all hospital staff is a) 24.385 to 25.615 b) 23.200 to 26.800 c) 24.301 to 25.699 d) 23.236 to 26.764
A random sample of 50 perceived age estimates for a model in a cigarette advertisement showed...
A random sample of 50 perceived age estimates for a model in a cigarette advertisement showed that = 26.59 years and that s = 3.7308 years. (a) Use this sample to calculate a 95 percent confidence interval for the population mean age estimate for all viewers of the ad. Assume normality. (Round your answers to 3 decimal places.) The 95 percent confidence interval is [ , ]. (b) Remembering that the cigarette industry requires that models must appear at least...
The average age at marriage in the United State is 27.2 for men. In a random...
The average age at marriage in the United State is 27.2 for men. In a random sample of n = 50 Indiana married men, the average age at marriage was x̅ = 26.5 with a standard deviation of s = 2.8 years. Does this sample provide a significant evidence that the average age at marriage among Indiana men is below the national average? State the null and alternative hypotheses and compute the test statistic. For the decision rule use α...
A random sample of 46 adult coyotes in a region of northern Minnesota showed the average...
A random sample of 46 adult coyotes in a region of northern Minnesota showed the average age to be x = 2.05 years, with sample standard deviation s = 0.84 years. However, it is thought that the overall population mean age of coyotes is μ = 1.75. Do the sample data indicate that coyotes in this region of northern Minnesota tend to live longer than the average of 1.75 years? Use α = 0.01. (a) What is the level of...
can I have solutions, please A random sample of 144 observations has a mean of 20,...
can I have solutions, please A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is known to equal 4.8. The 95.44% confidence interval for the population mean is a. 15.2 to 24.8 b. 19.200 to 20.800 c. 19.216 to 20.784 d. 21.2 to 22.8 When the level of confidence decreases, the margin of error stays the same becomes smaller becomes larger becomes smaller or larger,...
A simple random sample of 100 postal employees is used to test if the average time...
A simple random sample of 100 postal employees is used to test if the average time postal employees have worked for the postal service has changed from the value of 7.5 years recorded 20 years ago. The sample mean was x¯ = 7 years with a standard deviation of s = 2 years. Assume the distribution of the time the employees have worked for the postal service is approximately Normal. The hypotheses being tested are H0 : µ = 7.5,...
A random sample of 46 adult coyotes in a region of northern Minnesota showed the average...
A random sample of 46 adult coyotes in a region of northern Minnesota showed the average age to be x = 2.03 years, with sample standard deviation s = 0.76 years. However, it is thought that the overall population mean age of coyotes is μ = 1.75. Do the sample data indicate that coyotes in this region of northern Minnesota tend to live longer than the average of 1.75 years? Use α = 0.01. (a) What is the level of...
A random sample of 41 adult coyotes in a region of northern Minnesota showed the average...
A random sample of 41 adult coyotes in a region of northern Minnesota showed the average age to be x = 2.09 years, with sample standard deviation s = 0.88 years. However, it is thought that the overall population mean age of coyotes is μ = 1.75. Do the sample data indicate that coyotes in this region of northern Minnesota tend to live longer than the average of 1.75 years? Use α = 0.01. (a) What is the level of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT