Question

A random sample of 16 registered nurses in a large hospital showed that they worked on...

A random sample of 16 registered nurses in a large hospital showed that they worked on average 44.3 hours per week. The standard deviation of the sample was 2.3. Estimate the mean of the population with 99% confidence. Assume the variable is normally distributed. Round intermediate answers to at least three decimal places. Round your final answers to one decimal place.

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
A random sample of 18 registered nurses in a large hospital showed that they worked on...
A random sample of 18 registered nurses in a large hospital showed that they worked on average 44.8 hours per week. The standard deviation of the sample was 2.4. Estimate the mean of the population with 95% confidence. Assume the variable is normally distributed. Round intermediate answers to at least three decimal places. Round your final answers to one decimal place.
A random sample of 19 registered nurses in a large hospital showed that they worked on...
A random sample of 19 registered nurses in a large hospital showed that they worked on average 44.6 hours per week. The standard deviation of the sample was 2.1. Estimate the mean of the population with 90%confidence. Assume the variable is normally distributed. Round intermediate answers to at least three decimal places. Round your final answers to one decimal place.
In a large hospital, a nursing director selected a random sample of 30 registered nurses and...
In a large hospital, a nursing director selected a random sample of 30 registered nurses and found that the mean of their ages was 30.2. The population standard deviation for the registered nurse ages is 5.6. She selected a random sample of 40 nursing assistants and found the mean of their ages was 31.7. The population standard deviation of the ages for the assistants is 4.3. At the 1% level of significance, test the claim that the mean age of...
According to the Bureau of Labor Statistics, the mean salary for registered nurses in Kentucky was...
According to the Bureau of Labor Statistics, the mean salary for registered nurses in Kentucky was $55,599. The distribution of salaries is assumed to be normally distributed with a standard deviation of $5,987. Someone would like to determine if registered nurses in Ohio have a greater average pay. To investigate this claim, a sample of 269 registered nurses is selected from the Ohio Board of Nursing, and each is asked their annual salary. The mean salary for this sample of...
At a large company, the Director of Research found that the average work time lost by...
At a large company, the Director of Research found that the average work time lost by employees due to accidents was 94 hours per year. She used a random sample of 20 employees. The standard deviation of the sample was 5.9 hours. Estimate the population mean for the number of hours lost due to accidents for the company, using a 95% confidence interval. Assume the variable is normally distributed. Round intermediate answers to at least three decimal places. Round your...
According to the Bureau of Labor Statistics, the mean salary for registered nurses in Kentucky was...
According to the Bureau of Labor Statistics, the mean salary for registered nurses in Kentucky was $58,605. The distribution of salaries is assumed to be normally distributed with a standard deviation of $5,688. Someone would like to determine if registered nurses in Ohio have a greater average pay. To investigate this claim, a sample of 297 registered nurses is selected from the Ohio Board of Nursing, and each is asked their annual salary. The mean salary for this sample of...
A simple random sample of 16 observations is derived from a normally distributed population with a...
A simple random sample of 16 observations is derived from a normally distributed population with a known standard deviation of 2.5. [You may find it useful to reference the z table.] a. Is the condition that X−X− is normally distributed satisfied? Yes No b. Compute the margin of error with 95% confidence. (Round intermediate calculations to at least 4 decimal places. Round "z" value to 3 decimal places and final answer to 2 decimal places.)
11. A random sample of 22 observations is used to estimate the population mean. The sample...
11. A random sample of 22 observations is used to estimate the population mean. The sample mean and the sample standard deviation are calculated as 135.5 and 30.50, respectively. Assume that the population is normally distributed. [You may find it useful to reference the t table.] a. Construct the 90% confidence interval for the population mean. (Round intermediate calculations to at least 4 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.) Confidence...
A random sample of 14 observations is used to estimate the population mean. The sample mean...
A random sample of 14 observations is used to estimate the population mean. The sample mean and the sample standard deviation are calculated as 158.4 and 30.10, respectively. Assume that the population is normally distributed. [You may find it useful to reference the t table.] a. Construct the 90% confidence interval for the population mean. (Round intermediate calculations to at least 4 decimal places. Round "t" value to 3 decimal places and final answers to 2 decimal places.) b. Construct...
A simple random sample of 10 observations is derived from a normally distributed population with a...
A simple random sample of 10 observations is derived from a normally distributed population with a known standard deviation of 2.1. [Use Excel instead of the z table.] a. Is the condition that X−X− is normally distributed satisfied? _Yes _No b. Compute the margin of error with 99% confidence. (Round intermediate calculations to at least 4 decimal places. Round "z" value to 3 decimal places and final answer to 2 decimal places.) c. Compute the margin of error with 95%...