If there are 300 nurses employed by a hospital and 70 are selected for observation, the...
If there are 300 nurses employed by a hospital and 70 are selected for observation, the 70 are known as a:
Select one:
a. Sample
b. Population
c. Parameter
d. Statistic
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If there are 300 nurses employed by a hospital and 70 are
selected for observation, the...
In a large hospital, a nursing director selected a random sample of 38 registered nurses and found that the mean of their ages was 31.9
In a large hospital, a nursing director selected a random sample of 38 registered nurses and found that the mean of their ages was 31.9. The population standard deviation for the ages is 4.2. She selected a random sample of 28 nursing assistants and found the mean of their ages was 29.5. The population standard deviation of the ages for the assistants is 6.0. Find the 99% confidence interval of the differences in the ages. Use μ1 for the mean...
Data about salaries showed that staff nurses in Tampa earn less than staff nurses in Dallas...
Data about salaries showed that staff nurses in Tampa earn less than staff nurses in Dallas (The Tampa Tribune, Jan 15. 2007). You are a manager at a Tampa hospital and want to test the claim of the Tribune. You wish to test the claim at a significance level of a = 0.001. So you conduct a follow up survey of 25 staff nurses in Tampa and 22 staff nurses in Dallas. You find that the sample from Tampa showed...
A population has a mean of 300 and a standard deviation of 70. Suppose a sample...
A population has a mean of 300 and a standard deviation of 70. Suppose a sample of size 125 is selected and (x-bar) is used to estimate (mu) . Use z-table. A. What is the probability that the sample mean will be within +/- 8 of the population mean (to 4 decimals)? B. What is the probability that the sample mean will be within +/- 16 of the population mean (to 4 decimals)?
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 44.7 hours per week. the standard deviation of the sample was 2.2. 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 population has a mean of 300 and a standard deviation of 70. Suppose a sample...
A population has a mean of 300 and a standard deviation of 70. Suppose a sample of size 100 is selected and is used to estimate What is the probability that the sample mean will be within +/- 3 of the population mean (to 4 decimals)? What is the probability that the sample mean will be within +/- 12 of the population mean (to 4 decimals)? (Round z value in intermediate calculations to 2 decimal places.)
You wish to test the claim that μ < 300. A sample of 64 yielded a...
You wish to test the claim that μ < 300. A sample of 64 yielded a mean of 280. If σ is known to be 70, compute the value of the standardized test statistic, z. A. 8.75 B. -0.29 C. 0.29 D. -2.29
A random sample of 13 registered nurses in a large hospital showed that they worked on average 44.3 hours per week
A random sample of 13 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.
A random sample of 18 registered nurses in a large hospital showed that they worked on average 44.4 hours per week.
A random sample of 18 registered nurses in a large hospital showed that they worked on average 44.4 hours per week. The standard deviation of the sample was 2.8. 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.
on 6 A sample n.25 is selected from a population with mean, u = 50, 0=...
on 6 A sample n.25 is selected from a population with mean, u = 50, 0= 10, a researcher calculated the sample mean, M - 55. Assuming the researcher was performing a two-tailed test, is the sample mean significantly different from the population mean? For the test, a -.05. ed out of Select one: O a.p=0.4938, no difference between the sample mean and the population mean O b.p = 0.0062, significant difference between the sample mean and the population mean...
In point estimation, Select one: O a. data from the sample is used to estimate the...
In point estimation, Select one: O a. data from the sample is used to estimate the population parameter O b. the mean of the population equals the mean of the sample c. data from the population is used to estimate O the population parameter O d. data from the sample is used to estimate the sample statistic
Data about salaries showed that staff nurses in Tampa earn less than staff nurses in Dallas (The Tampa Tribune, Jan 15. 2007). You are a manager at a Tampa hospital and want to test the claim of the Tribune. You wish to test the claim at a significance level of a = 0.001. So you conduct a follow up survey of 25 staff nurses in Tampa and 22 staff nurses in Dallas. You find that the sample from Tampa showed...
on 6 A sample n.25 is selected from a population with mean, u = 50, 0= 10, a researcher calculated the sample mean, M - 55. Assuming the researcher was performing a two-tailed test, is the sample mean significantly different from the population mean? For the test, a -.05. ed out of Select one: O a.p=0.4938, no difference between the sample mean and the population mean O b.p = 0.0062, significant difference between the sample mean and the population mean...
In point estimation, Select one: O a. data from the sample is used to estimate the population parameter O b. the mean of the population equals the mean of the sample c. data from the population is used to estimate O the population parameter O d. data from the sample is used to estimate the sample statistic
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