help with A and D, please!!!

Statistics
Tutor: None Selected Time limit: 1 Day

Apr 13th, 2015

a) 99% CI for population mean:( xbar-zstdev/sqrt(n) , xbar+zstdev/sqrt(n))= (37.5-2.88,37.5+2.88)=(34.62, 40.38)

lower limit:34.62

upper limit: 40.38

margin of error= 2.88

b) n= z^2 stdev^2/E^2 =2.58*2.58*7.9*7.9/2.3*2.3 =79

Apr 14th, 2015

Did you know? You can earn $20 for every friend you invite to Studypool!
Click here to
Refer a Friend
...
Apr 13th, 2015
...
Apr 13th, 2015
Feb 25th, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer