Cashback Offer (25th Nov-05th Dec 2020). Get Flat 10% Cashback credited in your account on a minimum transaction of $80. Post Your Question

Question Details Normal
$ 21.99

a sample of 100 adults

  • From Mathematics, Statistics
  • Due on 04 Nov, 2020 06:52:00
  • Asked On 03 Nov, 2020 08:57:47
  • Due date has already passed, but you can still post solutions.
Question posted by
Online Tutor Profile
request

1.     A sample of 100 adults showed that their sleep time is 6.73 hours.  A common recommendation is that population adults should sleep 7 hours or more each night with a population standard deviation of 1.99 hours.  Use a 5% level of significance to test the claim the adult mean amount of sleep is less than 7 hours.

2. Assume that the foot lengths of women are normally distributed with a mean of 9.6 inches and a standard deviation of 0.9 inches.  Find the probability that 36 women have foot lengths with a mean greater than 9.9 inches.

3    A sample of 205 baby girls weighed 30.4 hg with a standard deviation of 7.1 hg.  Develop a 95% confidence interval to estimate the weights of baby girls.

4. A sample of 15 girls at birth had a mean weight of 30.9 hg with a sample standard deviation of 1.8 hg.  Construct a 95% confidence interval to estimate the mean weight of girls. 

5.   Find the sample size required to estimate the mean IQ of professional musicians.  Assume that we want 95% confidence level that the mean from the sample is within 3 IQ points of the true population mean with a population standard deviation 15.

6. A sample of 36 regular Coke shows a sample mean of 12.20 ounces with a sample standard deviation of 0.6 ounces.  Use a 5% significant level to test the claim that cans of Coke have a mean volume exactly 12 ounces.        

7. A sample of 6 child booster seats for cars showed that the booster seat has a mean of 804 hic (standard head injury condition units) with a standard deviation of 273 hic.  Use a 1% significant level to test the claim that the child booster seats are at least 1000 hic to meet the safety standard.    

8. A survey of 420095 cell phone users found that 0.0321% of them developed cancer of the brain or nervous system.  Prior to this study of cell phone use, the rate of such cancer was found to be 0.0340% for those not using cell phones.  Use the sample data to construct a 95% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system.

9. Find the sample size required to estimate the percentage or proportion of college students who take a statistics course, if on a prior study, 50% of students surveyed took statistics.  Assume that we want 95% confidence level that the percentage or proportion from the sample is within 3% points of the true population proportion.

10.  A random sample of 860 births in New York State included 400 boys.  Use a 5% level of significance to test the claim that 51.2% of newborn babies are boys.

Available Answers
$ 25.00

[Solved] a sample of 100 adults

  • This solution is not purchased yet.
  • Submitted On 04 Nov, 2020 01:10:04
Answer posted by
Online Tutor Profile
solution
1. A sample of 100 adults showed that their sleep time is 6.73 hours. A common recommendation is that population adults should sleep 7 hours or more each night with a population standard deviation of 1.99 hours. Use a 5% level of significance to test the claim the adult mean amount of sleep is less than 7 hours. 2. Assume that the foot lengths of women are normally distributed with a mean of 9.6 inches and a standard deviation of 0.9 inches. Find the probability that 36 women have foot lengths with a mean greater than 9.9 inches. 3 A sample of 205 baby girls weighed 30.4 hg with a standard deviation of 7.1 hg. Develop a ...
Buy now to view the complete solution
Other Related Questions
User Image
mycou...

The benefits of buying study notes from CourseMerit

Assurance Of Timely Delivery
We value your patience, and to ensure you always receive your homework help within the promised time, our dedicated team of tutors begins their work as soon as the request arrives.
Best Price In The Market
All the services that are available on our page cost only a nominal amount of money. In fact, the prices are lower than the industry standards. You can always expect value for money from us.
Uninterrupted 24/7 Support
Our customer support wing remains online 24x7 to provide you seamless assistance. Also, when you post a query or a request here, you can expect an immediate response from our side.
closebutton
Only 45 characters allowed.
closebutton

$ 629.35