Question

A laboratory in Washington is interested in finding the mean chloride level for a healthy resident...

A laboratory in Washington is interested in finding the mean chloride level for a healthy resident in the state. A random sample of

70

healthy residents has a mean chloride level of

102

mEq/L. If it is known that the chloride levels in healthy individuals residing in Washington have a standard deviation of

42

mEq/L, find a

95%

confidence interval for the true mean chloride level of all healthy Washington residents. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place.

What is the lower limit of the

95%

confidence interval?
What is the upper limit of the

95%

confidence interval?
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
A laboratory in New York is interested in finding the mean chloride level for a healthy...
A laboratory in New York is interested in finding the mean chloride level for a healthy resident in the state. A random sample of 50 healthy residents has a mean chloride level of 105 mEq/L. If it is known that the chloride levels in healthy individuals residing in New York have a standard deviation of 37 mEq/L, find a 95% confidence interval for the true mean chloride level of all healthy New York residents. Then complete the table below. What...
A laboratory claims that the mean sodium level, ? , of a healthy adult is 141...
A laboratory claims that the mean sodium level, ? , of a healthy adult is 141 mEq per liter of blood. To test this claim, a random sample of 90 adult patients is evaluated. The mean sodium level for the sample is 140 mEq per liter of blood. It is known that the population standard deviation of adult sodium levels is 14 mEq. Can we conclude, at the 0.05 level of significance, that the population mean adult sodium level differs...
A laboratory claims that the mean sodium level, μ , of a healthy adult is 141...
A laboratory claims that the mean sodium level, μ , of a healthy adult is 141 mEq per liter of blood. To test this claim, a random sample of 26 adult patients is evaluated. The mean sodium level for the sample is 144 mEq per liter of blood. It is known that the population standard deviation of adult sodium levels is 11 mEq. Assume that the population is normally distributed. Can we conclude, at the 0.05 level of significance, that...
A laboratory claims that the mean sodium level, μ, of a healthy adult is 138 mEq...
A laboratory claims that the mean sodium level, μ, of a healthy adult is 138 mEq per liter of blood. To test this claim, a random sample of 43 adult patients is evaluated. The mean sodium level for the sample is 144 mEq per liter of blood. It is known that the population standard deviation of adult sodium levels is 14 mEq. Assume that the population is normally distributed. Can we conclude, at the 0.05 level of significance, that the...
A laboratory claims that the mean sodium level, μ , of a healthy adult is 138...
A laboratory claims that the mean sodium level, μ , of a healthy adult is 138 mEq per liter of blood. To test this claim, a random sample of 50 adult patients is evaluated. The mean sodium level for the sample is 135 mEq per liter of blood. It is known that the population standard deviation of adult sodium levels is 15 mEq. Can we conclude, at the 0.01 level of significance, that the population mean adult sodium level differs...
A psychologist is interested in the mean IQ score of a given group of children. It...
A psychologist is interested in the mean IQ score of a given group of children. It is known that the IQ scores of the group have a standard deviation of 12. The psychologist randomly selects 80 children from this group and finds that their mean IQ score is 112. Based on this sample, find a 90% confidence interval for the true mean IQ score for all children of this group. Then complete the table below. Carry your intermediate computations to...
The mayor is interested in finding a 95% confidence interval for the mean number of pounds...
The mayor is interested in finding a 95% confidence interval for the mean number of pounds of trash per person per week that is generated in the city. The study included 225 residents whose mean number of pounds of trash generated per person per week was 37.5 pounds and the standard deviation was 6.6 pounds. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a t or z  distribution? b. With 95% confidence the population...
An existing inventory for a test measuring self-esteem indicates that the scores have a standard deviation...
An existing inventory for a test measuring self-esteem indicates that the scores have a standard deviation of 8. A psychologist gave the self-esteem test to a random sample of 70 individuals, and their mean score was 62. Construct a 95% confidence interval for the true mean of all test scores. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) What...
A researcher is interested in finding a 90% confidence interval for the mean number minutes students...
A researcher is interested in finding a 90% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 102 students who averaged 34.1 minutes concentrating on their professor during the hour lecture. The standard deviation was 12.5 minutes. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? t z  distribution. b. With 90% confidence the population mean minutes of concentration is...
A sanitation department is interested in estimating the mean amount of garbage per bin for all...
A sanitation department is interested in estimating the mean amount of garbage per bin for all bins in the city. In a random sample of 40 bins, the sample mean amount was 51.5 pounds and the sample standard deviation was 3.6 pounds. Construct 95% and 99% confidence intervals for the mean amount of garbage per bin for all bins in the city. a) What is the lower limit of the 95% interval? Give your answer to three decimal places.   b)...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT