Find confidence interval for percentage of eighth graders

Assignment Help Basic Statistics

Reference no: EM13120482

The National Institute on Alcohol Abuse and Alcoholism recently reported that of 100 eighth graders recently sampled, 41 of them had used alcohol.

a) Find a 98% confidence interval for the percentage of all eighth graders who have used alcohol. Round the upper and lower bounds to three decimal places.

Reference no: EM13120482

Questions Cloud

What is the maximum amt of (ba2+) that can be maintained : what is the maximum amt of (Ba2+) that can be maintained in 1.9 L of a .030 M solution of Na2SO4.

What is the partial pressure of o2 : A mixture of CO, CO2 and O2 is contained within a 275 mL ?ask at 0?C. If the total pressure is 780 torr, the CO has a partial pressure of 330 torr and the CO2 has a partial pressure of 330 torr.

Finding relevant-personally meaningful : What type of graph would you use to represent the data and why? Focus on finding relevant, personally meaningful material to work with for these students.

Firms expected rate of return : Taggart Inc.'s stock has a 25% chance of producing a 30% return, a 50% chance of producing a 12% return, and a 25% chance of producing a -18% return. What is the firm's expected rate of return?

Find confidence interval for percentage of eighth graders : Find a 98% confidence interval for the percentage of all eighth graders who have used alcohol. Round the upper and lower bounds to three decimal places.

How many moles of the second reactant would be require : For the unbalanced equation Cl2 ++ KI = I2 + KCl - how many moles of the second reactant would be require to react exactly with the 0.275 mole of the first reactant

Description of quotient and remainder : Evette has 41 1/2ft. of string. She wants to cut it into pieces 3 3/4ft. long. How many pieces of string will she have? how much string remains, if any?

Find the confidence interval of the true mean : The winning team's scores in 9 high school basketball games were recorded. If the sample mean is 9.8 points and the sample standard deviation is 0.15 points, find the 98% confidence interval of the true mean.

How many milliliters of a stock solution would you need : how many milliliters of a stock solution of 2.00 m kno3 would you need to prepare 100.0 ml of 0.150M KNO3

User Account

All Pages