Question

Many medical professionals believe that eating too much red meat increases the risk of heart disease...

Many medical professionals believe that eating too much red meat increases the risk of heart disease and cancer. Suppose you would like to conduct a survey to determine the annual consumption of beef by a typical American and want to use four pounds as the desired margin of error for a confidence interval of the population mean. Assume the population standard deviation is 20 pounds. Determine the sample size when:

A 90% confidence interval is desired for the mean amount of beef consumed.

B 99% confidence interval is desired for the mean amount of beef consumed.

Suppose you want to develop a confidence interval for the proportion of Americans who over-consume red meat with a desire margin of error of 0.1%. Determine the sample size needed when:

c) A 90% confidence interval is desired for the proportion of Americans who over-consume red meat.

d) A 95% confidence interval is desired for the proportion of Americans who over-consume red meat.

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
An online survey reported that 60% of persons are not confident that they are saving enough...
An online survey reported that 60% of persons are not confident that they are saving enough for retirement. Suppose the Department of Economics would like to do a follow-up study to determine how many persons are saving each year toward retirement and want to use $100 as the desired margin of error for an interval estimate of the population mean. Use $1100 as a planning value for the standard deviation and recommend a sample size for each of the following...
Suppose a random sample of size 11 was taken from a normally distributed population, and the...
Suppose a random sample of size 11 was taken from a normally distributed population, and the sample standard deviation was calculated to be s = 6.5. We'll assume the sample mean is 10 for convenience. a) Calculate the margin of error for a 90% confidence interval for the population mean. Round your response to at least 3 decimal places. Number b) Calculate the margin of error for a 95% confidence interval for the population mean. Round your response to at...
4. Find the margin of error E. In a random sample of 151 college students, 84...
4. Find the margin of error E. In a random sample of 151 college students, 84 had part-time jobs. Find the margin of error E for the 95% confidence interval used to estimate the population proportion. Round your answer to four decimal places. Answer 0.0792 5. Find the minimum sample size required to estimate the population proportion p: Margin of error: 0.10; confidence level: 95%; from a prior study, is known to be 66%. 6. Find the minimum sample size...
(S 9.2) Recall that a confidence interval for the sample mean can be calculated using the...
(S 9.2) Recall that a confidence interval for the sample mean can be calculated using the interval x¯?tn?1?sn??????x¯+tn?1?sn??? Thus, the margin of error is tn?1?sn??? We can recover the margin of error from an interval constructed on the calculator using algebra. Suppose a random sample of size 16 was taken from a normally distributed population, and the sample standard deviation was calculated to be s = 6.3. We'll assume the sample mean is 10 for convenience. a) Calculate the margin...
A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for...
A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 985 people age 15 or​ older, the mean amount of time spent eating or drinking per day is 1.13 hours with a standard deviation of 0.63 hour. Complete parts ​(a) through​ (d) below. LOADING... Click the icon to view the table of critical​ t-values. ​(a) A histogram of time spent eating and drinking each day is skewed right. Use this...
A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for...
A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 1024 people age 15 or​ older, the mean amount of time spent eating or drinking per day is 1.61 hours with a standard deviation of 0.55 hour. Complete parts ​(a) through ​(d) below. ​(a) A histogram of time spent eating and drinking each day is skewed right. Use this result to explain why a large sample size is needed to...
You want to estimate the proportion of American voters who are optimistic about the state of...
You want to estimate the proportion of American voters who are optimistic about the state of the economy. How large a sample would be needed to ensure a 95% confidence level that the actual population proportion of American voters will be no more than 3 percentage points from the sample proportion?(hint, no information about ? ^) (a) 1506 (b) 1068 (c) 3152 (d) 938 Suppose at the 90% confidence level we calculate a confidence interval described by 23.8<?<26.2. Which of...
5. How heavy are the backpacks carried by college students? To estimate the weight of backpacks...
5. How heavy are the backpacks carried by college students? To estimate the weight of backpacks carried by college students, a researcher weighs the backpacks from a random sample of 58 college students. The average backpack weight ends up being 15.7 pounds, with a standard deviation of 2.4 pounds. If you use this data to construct a 90% confidence interval, what will the margin of error be for this interval? Try not to do a lot of intermediate rounding until...
.1) How large a sample must one take to be 90% confident that the estimate is...
.1) How large a sample must one take to be 90% confident that the estimate is within 5% of the true      proportion of women over 55 who are widows?  A recent study indicated that 29% of the 100 women      over 55 in the study were widows. 8.  As a manufacturer of golf equipment, the Spalding Corporation wants to estimate the proportion of      golfers who are left-handed.  (The company can use this information in planning for the number of      right-handed and left-handed sets of...
A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for...
A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 10301030 people age 15 or? older, the mean amount of time spent eating or drinking per day is 1.981.98 hours with a standard deviation of 0.520.52 hour. Complete parts ?(a) through ?(d) below. ?(a) A histogram of time spent eating and drinking each day is skewed right. Use this result to explain why a large sample size is needed to...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT