Question

(Please if possible, provide with example ages) 1. How to find point estimation of average age...

(Please if possible, provide with example ages)

1. How to find point estimation of average age with 95% confidence?

2. How to calculate margin of error with 95% confidence?

3. How to calculate interval estimate of the population mean?

4. What happens to confidence interval if confidence level would increase to 99%? Would co. int. be wider or more narrow?

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
2. Based on a sample data of 64 children mean age of children in the summer...
2. Based on a sample data of 64 children mean age of children in the summer camp A is 12,4 years with Standard deviation 3 years. Estimate the average age of children in whole population. Population size is 8100 a) Find the point estimation for average age b) With 95% confidence, what is the margin of error? With 90% confidence, what is the margin of error? c) What is the 95% confidence interval estimate of the population mean (mean children...
Estimation & Confidence Interval 1. A sample of 1500 homes sold recently in a state gave...
Estimation & Confidence Interval 1. A sample of 1500 homes sold recently in a state gave the mean price of homes equal to $287,350. The population standard deviation of the prices of homes in this state is $53,850. a. Calculate the margin error and construct a 90% confidence interval for the mean price of all homes in this state. b. Calculate the margin error and construct a 95% confidence interval for the mean price of all homes in this state....
The Bureau of Labor Statistics collects information on the ages of people in the civilian labor...
The Bureau of Labor Statistics collects information on the ages of people in the civilian labor force and publishes the results in Current Population Survey. Fifty people in the civilian labor force are randomly selected; the mean of their ages is 41.4 years. Assume that the population standard deviation of the ages is 12.1 years. (a) Find a 99% confidence interval for the mean age of all people in the civilian labor force (round to 2 decimal places). Write a...
A sample of 53 night-school students' ages is obtained in order to estimate the mean age...
A sample of 53 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 25.6 years. The population variance is 27. (a) Give a point estimate for μ. (Give your answer correct to one decimal place.) (b) Find the 95% confidence interval for μ. (Give your answer correct to two decimal places.) Lower Limit Upper Limit (c) Find the 99% confidence interval for μ. (Give your answer correct to two decimal places.) Lower...
please provide detailed explanation for each part of the question. We are interested in estimating the...
please provide detailed explanation for each part of the question. We are interested in estimating the mean systolic blood pressure for female diabetics between the ages of 30 and 34. For the purposes of this question you may assume that blood pressure in this population has a normal distribution. a. A random sample of 10 women is selected from this population. The average systolic blood pressure in this sample is 130 mmHg. The sample standard deviation is 9.2 mmHg. Calculate...
II. Please construct the confidence interval for the following example. First, compute the confidence interval. Second,...
II. Please construct the confidence interval for the following example. First, compute the confidence interval. Second, point out the margin of error. Third, point out the width of the confidence interval. Finally, , interpret the final result in the context. (Formula and computation) A random sample of 178 households reported an average of 2.1 TV sets per household. The sample standard deviation is 0.1. What would be the confidence interval? Please construct the confidence interval at the 99% confidence level,...
A survey of 25 randomly selected customers found that their average age was 31.84 years with...
A survey of 25 randomly selected customers found that their average age was 31.84 years with a standard deviation of 9.84 years. What is the standard error of the mean? How would the standard error have changed if the sample size had been 100 instead of 25 (assuming that the mean and standard deviations were the same)? How many degrees of freedom would the t-statistic have for this set of data? What would the critical value t* be for a...
A student researcher compares the ages of cars owned by students and cars owned by faculty...
A student researcher compares the ages of cars owned by students and cars owned by faculty at a local state college. A sample of 263 cars owned by students had an average age of 7.25 years. A sample of 291 cars owned by faculty had an average age of 7.12 years. Assume that the population standard deviation for cars owned by students is 3.77 years, while the population standard deviation for cars owned by faculty is 2.99 years. Determine the...
**** PLEASE SHOW HOW TO SOLVE IN EXCEL NOT HANDWRITTEN*** The average cost per night of...
**** PLEASE SHOW HOW TO SOLVE IN EXCEL NOT HANDWRITTEN*** The average cost per night of a hotel room in New York City is $325. Assume this estimate is based on a sample of 100 hotels and that the sample standard deviation is $75. What is the 95% confidence interval estimate of the population mean? What is the 99% confidence interval estimate of the population mean?
Please answer both of the following What is the sample size needed to provide a margin...
Please answer both of the following What is the sample size needed to provide a margin of error of 3 with a 90% confidence when the population standard deviation equals 10? A local university administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of 5 examinations is selected at random and scored. The scores are shown below. Grade 78 70 76 81 95 At 99% confidence, determine an interval for the mean of...