Question

In a sample of 40 water specimens , 26 contained detectable levels of lead.   Construct a...

In a sample of 40 water specimens , 26 contained detectable levels of lead.  

Construct a 99.8% confidence interval for the proportion of water specimens that conatin lead.  

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In a sample of 42 water specimens take from a construction site, 26 contained detectable levels...
In a sample of 42 water specimens take from a construction site, 26 contained detectable levels of lead. Construct a 99% confidence interval for the proportion of water specimens that contain detectable levels of lead.
Periodically, a town water department tests the the drinking water of homeowners for contaminants such as...
Periodically, a town water department tests the the drinking water of homeowners for contaminants such as lead. The lead levels in water specimens collected for a sample of 10 residents of the town had a mean of 3.2 ?mg/L and a standard deviation of 2.9 ?mg/L. Complete parts a through c. a. Construct a 90?%confidence interval for the mean lead level in water specimens from the town.
Question 6 An Internet service provider sampled 474 customers, and finds that 102 of them experienced...
Question 6 An Internet service provider sampled 474 customers, and finds that 102 of them experienced an interruption in high-speed service during the previous month. What is the upper bound for the 99% confidence interval for the proportion of customers who experienced an interruption? Round to three decimal places (for example: 0.419). Write only a number as your answer. Question 7 In the computer game World of Warcraft, some of the strikes are critical strikes, which do more damage. Assume...
Periodically, a town water department tests the the drinking water of homeowners for contaminants such as...
Periodically, a town water department tests the the drinking water of homeowners for contaminants such as lead. The lead levels in water specimens collected for a sample of 10 residents of the town had a mean of 2.8 ​mg/L and a standard deviation of 2.7 ​mg/L. Complete parts a through c. a. Construct a 90​% confidence interval for the mean lead level in water specimens from the town. b. Interpret the interval in terms of this application. Choose the correct...
Periodically, a town water department tests the the drinking water of homeowners for contaminants such as...
Periodically, a town water department tests the the drinking water of homeowners for contaminants such as lead. The lead levels in water specimens collected for a sample of 10 residents of the town had a mean of 3.1 mg/L and a standard deviation of 1.6 mg/L. Complete parts a through c. a.Construct a 90​% confidence interval for the mean lead level in water specimens from the town. left parenthesis nothing comma nothing right parenthesis, ​(Round to three decimal places as​...
The Bureau of Alcohol, Tobacco, and Firearms (BATF) has been concerned about lead levels in California...
The Bureau of Alcohol, Tobacco, and Firearms (BATF) has been concerned about lead levels in California wines. In a previous testing of wine specimens, the standard deviation of the lead levels was around 162 parts per billion. How many wine specimens should be tested if the BATF wishes to estimate the mean lead level for California wines to within 10 parts per billion with 95% confidence? You may use the previous study’s standard deviation for ? when performing your sample...
An article contained the following observations on degree of polymerization for paper specimens for which viscosity...
An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 420 425 427 427 432 433 434 437 439 446 447 448 453 454 465 469 Suppose the sample is from a normal population. (a) Calculate a 95% confidence interval for the population mean, and interpret it. (b) Calculate a 95% upper confidence bound for the population mean, and interpret it
In a random sample of 150 packages shipped by air freight, 26 had some damage. Construct...
In a random sample of 150 packages shipped by air freight, 26 had some damage. Construct a 99% confidence interval for the true proportion of damaged packages using the large sample confidence interval formula. zα 1.282 1.645 1.960 2.326 2.576 3.090 α(tail area) 0.1 0.05 0.025 0.01 0.005 0.001 %ile 90 95 97.5 99 99.5 99.9 Your answers can be rounded to three decimal digit accuracy when entered. Lower limit is = Upper limit is =
A bottled water distributor wants to estimate the amount of water contained in 1​-gallon bottles purchased...
A bottled water distributor wants to estimate the amount of water contained in 1​-gallon bottles purchased from a nationally known water bottling company. The water bottling​ company's specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. A random sample of 50 bottles is​ selected, and the sample mean amount of water per 1​-gallon bottle is 0.993 gallon. A. Construct a 95​% confidence interval estimate for the population mean amount of water included in...
In a sample of 200 homes in Lagrange, 40 were found to have unsafe radon levels...
In a sample of 200 homes in Lagrange, 40 were found to have unsafe radon levels and of 100 homes in Hyde Park, 30 had unsafe radon levels. Form a 95% confidence interval on the difference in the proportions.