Question

The mean age of employees at a large corporation is 41.7 years with a standard deviation...

The mean age of employees at a large corporation is 41.7 years with a standard deviation of 2.9 years. Random samples of 25 are drawn from this population and the mean of each sample is determined. Find the mean of the sample mean.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Solution :

Given that ,

mean = = 41.7

standard deviation = = 2.9

n = 25

The mean of the sample mean

=   = 41.7 and

Sample standard deviation

= / n = 2.9 / 25 = 0.58

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
The amounts of time employees at a large corporation work each day are normally​ distributed, with...
The amounts of time employees at a large corporation work each day are normally​ distributed, with a mean of 7.8 hours and a standard deviation of 0.36 hour. Random samples of size 25 and 37 are drawn from the population and the mean of each sample is determined. What happens to the mean and the standard deviation of the distribution of sample means as the size of the sample​ increases? If the sample size is nequals25​, find the mean and...
The amounts of time employees at a large corporation work each day are normally​ distributed, with...
The amounts of time employees at a large corporation work each day are normally​ distributed, with a mean of 7.7 hours and a standard deviation of 0.36 hour. Random samples of size 22 and 37 are drawn from the population and the mean of each sample is determined. What happens to the mean and the standard deviation of the distribution of sample means as the size of the sample​ increases? 1.If the sample size is n=22 find the mean and...
The amounts of time employees of a telecommunications company have worked for the company are normally...
The amounts of time employees of a telecommunications company have worked for the company are normally distributed with a mean of 5.6 years and a standard deviation of 1.9 years. Random samples of size 28 are drawn from the population and the mean of each sample is determined. Use the Central Limit Theorem to find the mean and standard error of the mean of the sampling distribution. ​(Round to two decimal places as needed​).
In the past the average age of employees of a large corporation has been 40 years....
In the past the average age of employees of a large corporation has been 40 years. Recently, the company has been hiring older individuals. In order to determine whether there has been an increase in the average age of all the employees, a sample of 25 employees was selected. The average age in the sample was 42.5 years with a sample standard deviation of 5 years. Using a significance level of α = .01, do the sample data provide support...
The annual salary for one particular occupation is normally​ distributed, with a mean of about ​$127,000...
The annual salary for one particular occupation is normally​ distributed, with a mean of about ​$127,000 and a standard deviation of about ​$17,000. Random samples of 38 are drawn from this​ population, and the mean of each sample is determined. Find the mean and standard deviation of the sampling distribution of these sample means.​ Then, sketch a graph of the sampling distribution.
An unknown distribution has a mean of 90 and a standard deviation of 15. Samples of...
An unknown distribution has a mean of 90 and a standard deviation of 15. Samples of size n=25 are drawn randomly form the population. Find the probability that the sample mean is between 85 and 92 is the area under which curve?
In the past, the average age of employees of a mid-sized corporation has been 35 years....
In the past, the average age of employees of a mid-sized corporation has been 35 years. Recently, the company has been hiring older individuals. In order to determine whether there has been an increase in the average age of all the employees, a sample of 64 employees was selected. The average age in the sample was 45 years with a standard deviation of 16 years. Let α = .05. 13. State the null and the alternative hypotheses. 14. Compute the...
In the past, the average age of employees of a mid-sized corporation has been 35 years....
In the past, the average age of employees of a mid-sized corporation has been 35 years. Recently, the company has been hiring older individuals. In order to determine whether there has been an increase in the average age of all the employees, a sample of 64 employees was selected. The average age in the sample was 45 years with a standard deviation of 16 years. Let α = .05. 13. State the null and the alternative hypotheses. 14. Compute the...
1. Weights of women in one age group are normally distributed with a standard deviation σ...
1. Weights of women in one age group are normally distributed with a standard deviation σ of 21 lb. A researcher wishes to estimate the mean weight of all women in this age group. How large a sample must be drawn in order to be 95 percent confident that the sample mean will not differ from the population mean by more than 2.2 lb? First, what formula or test would be used to calculate that number? A. B. TInterval C....
IQ scores are normally distributed with a mean of 100 and a standard deviation of 16....
IQ scores are normally distributed with a mean of 100 and a standard deviation of 16. Assume that many samples of size n are taken from a large population of people and the mean IQ score is computed for each sample. a. If the sample size is n=49, find the mean and standard deviation of the distribution of sample means. The mean of the distribution of sample mean is?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT