Question

In a study of starting salaries for nurses, I surveyed 20 nurses. In this sample, the...

In a study of starting salaries for nurses, I surveyed 20 nurses. In this sample, the starting salary was $70,000 with a standard deviation of $8,000.

(a) (5pts) Develop a 95% confidence interval for the population mean.

(b) (5pts) Develop a 95% confidence interval for the population standard deviation.

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
6) In a study of starting salaries for nurses, I surveyed 20 nurses. In this sample,...
6) In a study of starting salaries for nurses, I surveyed 20 nurses. In this sample, the starting salary was $70,000 with a standard deviation of $8,000. (a) (10pts) Develop a 95% confidence interval for the population mean. (b) (10pts) Develop a 95% confidence interval for the population standard deviation. Please write out. Thank you man!
1- Recently, a university surveyed recent graduates of the English Department for their starting salaries. Four...
1- Recently, a university surveyed recent graduates of the English Department for their starting salaries. Four hundred graduates returned the survey. The average salary was $25,000 with a standard deviation of $2,500. a) What is the best point estimate of the population mean? b) What is the 95% confidence interval for the mean salary of all graduates from the English Department? Please show calculations on paper. Thank you. c) What do the confidence interval results mean?
A sample of 75 New York public school teachers was surveyed about their salaries. Their mean...
A sample of 75 New York public school teachers was surveyed about their salaries. Their mean salary was $65467 with a standard deviation of $5130. a. Use the Confidence Interval Calculator and a 90% confidence level to estimate the population mean salary. $65467 +/- $ b. Use a 95% confidence level to estimate the population mean salary. $65467 +/- $ c. Use a 99% confidence level to estimate the population mean salary. $65467 +/- $
A university surveyed recent graduates of the English department about their starting salaries. Four hundred graduates...
A university surveyed recent graduates of the English department about their starting salaries. Four hundred graduates returned the survey. The average salary was $25,000. Assume for purposes of this problem that the population standard deviation is known, and it is $2,500. A 95% confidence interval is constructed. What does the confidence interval mean? Group of answer choices There is a 95% probability that the population parameter will not lie within the interval constructed using the sample's data. The population mean...
A random sample of 20 starting salaries in a certain field found an average of $23...
A random sample of 20 starting salaries in a certain field found an average of $23 per hour, and a standard deviation of $3. Construct a 95% confidence interval for the true starting salary in this field.
The mean starting salary for nurses is $67,694 nationally. The standard deviation is approximately $11,333. The...
The mean starting salary for nurses is $67,694 nationally. The standard deviation is approximately $11,333. The starting salary is normally distributed. A sample 35 starting salaries for nurses is taken. Find the probability that the sample mean is more than $68,000. Represent the probability with a graph.
You have been asked to build a confidence interval of the population mean starting salary for...
You have been asked to build a confidence interval of the population mean starting salary for registered nurses in the United Stats. You already know that the population standard deviation for starting salaries is $7000 per year, and you want a margin of error no greater than plus or minus $1000. What is the minimum sample size that you should gather. If you want to have a level confidence of 95$%?
A study was conducted to estimate the difference in the mean salaries of elementary school teachers...
A study was conducted to estimate the difference in the mean salaries of elementary school teachers from two neighboring states. A sample of 10 teachers from the Indiana had a mean salary of $28,900 with a standard deviation of $2300. A sample of 14 teachers from Michigan had a mean salary of $30,300 with a standard deviation of $2100. Determine a 95% confidence interval for the difference between the mean salary in Indiana and Michigan.(Assume population variances are different.) write...
Annual starting salaries for college graduates with degrees in business administration are generally expected to be...
Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $30,000 and $45,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. a. What is the planning value for the population standard deviation? How large a sample should be taken if the desired margin of error is b.$500? c.$200? d.$100? e.Would you recommend trying to obtain the $100 margin of error? Explain.
An experiment is conducted to compare the starting salaries of male and female college graduates who...
An experiment is conducted to compare the starting salaries of male and female college graduates who find jobs. Pairs are formed by choosing a male and a female with the same major and similar grade point averages. Suppose a random sample of 10 pairs is formed in this manner and the starting annual salary of each person is recorded. The differences within the pairs are obtained by subtracting the female salary from the male salary. The following results are obtained:...