Question

A study regarding those that drink coffee showed that in a random sample of 18 individuals,...

A study regarding those that drink coffee showed that in a random sample of 18 individuals, the standard deviation for the number of times an individual drank coffee during a week was 5.2. Find the 95% confidence interval of the variance and the standard deviation. Show your work to receive credit

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
In a random sample of 39 individuals, the average number of minutes spent exercising each week...
In a random sample of 39 individuals, the average number of minutes spent exercising each week was 124.7 minutes with a population standard deviation of 34.3 minutes. Find the 91% confidence interval for the mean. Show your work to receive credit
A random sample of 15 colleges in Kansas showed that the annual salary has a sample...
A random sample of 15 colleges in Kansas showed that the annual salary has a sample variance of ?2=83.2. Find a 95% confidence interval for the population variance. (Must show work)
A study by the International Coffee Organisation found that persons aged30 –59 drank an average of...
A study by the International Coffee Organisation found that persons aged30 –59 drank an average of 0.57 cups of coffee per day. Assuming that the sample size is 200 with a sample standard deviation of 0.4 cups, construct a 95% confidence interval for the population mean cup of coffee. Interpret your answer.
A random sample of 18 registered nurses in a large hospital showed that they worked on...
A random sample of 18 registered nurses in a large hospital showed that they worked on average 44.8 hours per week. The standard deviation of the sample was 2.4. Estimate the mean of the population with 95% confidence. Assume the variable is normally distributed. Round intermediate answers to at least three decimal places. Round your final answers to one decimal place.
A random sample of 130 adult males was selected as part of a study on weight...
A random sample of 130 adult males was selected as part of a study on weight loss. The average weight at the beginning of the study was 265 pounds with a standard deviation of 22 pounds. Assuming the weight is normally distributed, provide a 99% confidence interval for the mean weight at the start of the study. You MUST show your work to receive full credit.
a study of 25 drivers showed that they drive an average of 300 miles a week...
a study of 25 drivers showed that they drive an average of 300 miles a week with a standard deviation of 20 miles. Identify the distribution used (t or z) and find and interpret a 95% confident interval for the average number of miles all drivers drive in 1 week. 2. A study of 50 students at a college showed that the average age was 20.2 with a standard deviation of 1.8. Identify the distribution used (t or z) and...
A random sample of 100 credit sales in a department store showed a sample mean of...
A random sample of 100 credit sales in a department store showed a sample mean of $64. The population standard deviation is known to be $16. A) Provide a 99% confidence interval for the population mean. B) Provide a 95% confidence interval for the population mean. C) Describe the effect of a lower confidence level on the margin of error.
18. A sample of 20 cans of tomato juice showed a standard deviation of 0.4 ounces....
18. A sample of 20 cans of tomato juice showed a standard deviation of 0.4 ounces. A 95% confidence interval estimate for the variance of the population is a. 0.2313 to 0.8533 b. 0.2224 to 0.7924 c. 0.0889 to 0.3169 d. 0.0925 to 0.3413
A random sample of 14 evenings (6 to 9 P.M.) at the O’Sullivan household showed the...
A random sample of 14 evenings (6 to 9 P.M.) at the O’Sullivan household showed the family received an average of = 5.2 solicitation phone calls each evening. The sample standard deviation was s = 1.9. Find a 95% confidence interval for the population mean number of solicitation calls this family receives each night. a). Calculate the Margin of Error for this scenario. [6] b). Calculate the 95% confidence interval. [8] c). What are the conditions necessary for this process.
a recent study of 25 students showed they spent average of $18.53 on gas per week,...
a recent study of 25 students showed they spent average of $18.53 on gas per week, the sample standard deviation of the sample was $3.00, construct a 95% confidence interval for the mean amount spent on gas per week
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT