A random sample of 100 credit sales in a department store showed an average sale of $120.00 . From past data, it is known that the standard deviation of the population is $40.00
a. Determine the standard error of the mean.
b. With a .95 probability, determine the margin of error.
c. What is the 95% confidence interval of the population mean?
a. 4
b. 7.84
c. $112.16 to $127.84
Business
You might also like to view...
A supernet mask works ________ a subnet mask
A) but not as well as B) in the very same way as C) in just the opposite way of D) twice as well as
Business
Server-side ActiveX components are instantiated by passing the name of the component as a string to ________ object method ________
(a) Request, ActiveX (b) Response, ActiveX (c) Server, CreateObject (d) Server, CreateActiveX
Business