Wednesday

April 16, 2014

April 16, 2014

Posted by **Anonymous** on Sunday, November 1, 2009 at 7:42pm.

a) Construct a 95% confidence interval estimate for the population mean the price for 2 tickets with online service charges, large popcorn and 2 medium soft drinks, assuming a normal distribution.

mean of sample = 36.53

n = 6

standard deviation = 19.26866 ( square root of ((36.15 - 36.53)^2 + (31 - 36.53)^2 + (35.05 - 36.53)^2 + (40.25 - 36.53)^2 + (33.75 - 36.53)^2 + (43 - 36.53)^2) / 6-1)

standard error of sample mean = 7.8664

critical value of t = 0.025

degrees of freedom = 5

95% C.I. = 36.53 +/- (critical value of t = 0.025)(7.8664)

95% C.I. = 36.53 +/- (2.571)(7.8664)

95% C.I. = 36.53 +/- 20.2245

My answer is wrong and the interval estimate is between 31.9267 and 41.1399. I think my error is solving for the standard deviation. How do you solve for it? Please provide a step-by-step solution. Thank you.

**Related Questions**

Algebra - A movie theater manager wants to know how many adults and how many ...

physics - Question: 15 of 30: The distance versus time plot for a particular ...

Algerba - THe senior class is raising money by selling popcorn amd soft drinks. ...

algebra 2 word problem - 1) a fitness club advertises a special for new members...

Statistics - MBA_GPA BS GPA 2.82 3.05 3.49 3.45 3.28 3.5 3.25 3.55 3.26 3.3 2.87...

Math - one satellite radio service charges $10.00 per month plus an activation ...

psychology - Following are the speeds of 40 cars clocked by radar on a ...

stastics - Following are the speeds of 40 cars clocked by radar on a particular ...

statistics - A researcher wants to determine if two brands of cigarettes contain...

statistics - A researcher wants to determine if two brands of cigarettes contain...