Question

Based on a random sample of 1120 ​adults, the mean amount of sleep per night is...

Based on a random sample of 1120 ​adults, the mean amount of sleep per night is 8.91 hours. Assuming the population standard deviation for amount of sleep per night is 3.2 ​hours, construct and interpret a 95​% confidence interval for the mean amount of sleep per night.

A 95​% confidence interval is ​(___,___)

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

Homework Answers

Answer #1

A 95​% confidence interval is ​(8.723, 9.097).

We can be 95% confident that true mean amount of sleep per night lies in the interval ​(8.723, 9.097).

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 researcher wants to determine how many hours of sleep adults get per night. She asks...
A researcher wants to determine how many hours of sleep adults get per night. She asks a random sample of 32 adults how many hours of sleep they get per night. The mean of their answers is 7.1 hours, and the standard deviation is 1.5 hours. Make a 95% confidence interval for the mean number of hours of sleep per night for adults. Round the end points of the confidence interval to 2 decimal points.
a. The number of hours of sleep per night that adults in the United States is...
a. The number of hours of sleep per night that adults in the United States is normally distributed with a mean of 6.8 hours and a standard deviation of 1.4 hours. If the recommended amount of sleep is 7 hours, what proportion of US adults are getting less than that amount of sleep? Round to the nearest ten-thousandth. b. The number of hours of sleep per night that adults in the United States is normally distributed with a mean of...
The number of hours adults sleep per night is normally distributed with a mean it 5.5...
The number of hours adults sleep per night is normally distributed with a mean it 5.5 hours. Assume that the standard deviation is unknown. If 75% of adults sleep more than 5.1 hours per night, what is the variance?
The number of hours adults sleep per night is normally distributed with a mean of 6.7...
The number of hours adults sleep per night is normally distributed with a mean of 6.7 hours. Assume that the standard deviation is unknown. If 75% of adults sleep more than 6.2 hours per night, what is the variance?
The Research Center interviewed a random sample of 1,546 adult Anericans to determine the average time...
The Research Center interviewed a random sample of 1,546 adult Anericans to determine the average time they spent sleeping per night. The sample mean was found to be 7.2 hours of sleep, with a sample standard deviation of 1.4 hours. Construct a 95% confidence interval for the true mean. Interpret for confidence interval in words.
In a study about how much College students sleep at night, a sample of 25 students...
In a study about how much College students sleep at night, a sample of 25 students was selected. The sample average mean number of hours of sleep was 6.64 and the sample standard deviation was 1.075. (a) Construct a 90% confidence interval for the true mean number of hours of sleep at night College students get. (b) Interpret the interval. (c) What assumptions must be satisfied for the interval obtained in part (a) to be statistically valid?
Suppose you want to know the average amount of sleep you get per night. You record...
Suppose you want to know the average amount of sleep you get per night. You record your elapsed sleep time over 35 nights. The mean is 7.1 and standard deviation is 2.3. Find a 95% confidence interval for your mean number of hours of sleep per night. Report the answer accurate to four decimal places < μμ <
Suppose you want to know the average amount of sleep you get per night. You record...
Suppose you want to know the average amount of sleep you get per night. You record your elapsed sleep time over 74 nights. The mean is 7.9 and standard deviation is 2.2. Find a 95% confidence interval for your mean number of hours of sleep per night. Report the answer accurate to four decimal places
A random sample of 40 adults with no children under the age of 18 years results...
A random sample of 40 adults with no children under the age of 18 years results in a mean daily leisure time of 5.96 ​hours, with a standard deviation of 2.35 hours. A random sample of 40 adults with children under the age of 18 results in a mean daily leisure time of 4.32 ​hours, with a standard deviation of 1.52 hours. Construct and interpret a 95​% confidence interval for the mean difference in leisure time between adults with no...
A random sample of 23 laptop computers has a mean price of $943.22 and a standard...
A random sample of 23 laptop computers has a mean price of $943.22 and a standard deviation of $838.71. Construct a 90% confidence interval of the population mean price and interpret the confidence interval in 1 sentence: Construct a 95% confidence interval of the population mean price and interpret the confidence interval in 1 sentence:
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT