math
posted by katy .
The National Center for Education surveyed 4400 college graduates about the lengths of time required to earn their bachelor's degrees. THe sample mean is 5.15 years, and assume that the population standard deviation is known to be 1.68 years. Based on gthe sample data, construct the 99% confidence interval for the mean time required by all college graduates.
Also, determine the margin of error, E.

Both the balls will meet at 8.9m above the ground.
Respond to this Question
Similar Questions

statistics
The scores of students on the ACT college entrance examination in a recent year had a normal distribution with a mean of 18.6 and a standard deviation of 5.9. A simple random sample of 50 students who took the exam is selected for … 
elizabeth high school
. An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within one year of the population mean. Assume the population of ages is normally distributed. Determine the minimum … 
Statistics
An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within one year of the population mean. Assume the population of ages is normally distributed. Determine the minimum … 
statistics
The National Center for Education surveyed 4400 college graduates about the lengths of time required to earn their bachelor's degrees. The sample mean is 5.15 years, and assume that standard deviation is known to be 1.68 years. Based … 
Math
A random sample of 42 college graduates revealed that they worked an average of 5.5 years on the job before being promoted. The sample standard deviation was 1.1 years. Using the .99 degree of confidence, what is the confidence interval … 
STAT
1. In a study of the income of U.S. factory workers, a random sample of 100 workers shows a sample mean of $35,000. Assume that the population standard deviation is $4,500, and that the population is normally distributed. A) Compute … 
statistics
A headline in a certain newspaper states that "most stay at first job less than 2 years." That headline is based on an online poll of 320 college graduates. Among those polled, 72% stayed at their first fulltime job less than 2 years. … 
Statistics
The Economic Policy Institute periodically issues reports on wages of entrylevel workers. The institute reported that entrylevel wages for male college graduates were $21.68 per hour and for female college graduates were $18.80 per … 
Statistics
Years to Earn Bachelorâ€™s Degree: Listed below are the lengths of time ( in years) it took for a random sample of college students to earn bachelorâ€™s degrees ( based on data from the U. S. National Center for Education Statistics). … 
Statistics Homework
Statistics Question: Years to Earn Bachelor's Degree Years to Earn Bachelor's Degree: Listed below are the lengths of time (in years) it took for a random sample of college students to earn bachelor's degrees (based on data from the …