A sales representative has 600 accounts. He wants to take a ...

[cookcarl]

A sales representative has 600 accounts. He wants to take a random sample to determine the mean amount of yearly sales for these accounts. From past research, he knows that the population standard deviation is approximately 28,000.
 
  How large a sample should he take in order to estimate the population mean within 8,000 at a 98 level of confidence?A) 60
  B) 45
  C) 75
  D) 30

Question 2

If a categorical independent variable, such as gender, contains exactly two categories, then how many dummy variable(s) will be needed to uniquely represent these categories?
 
  A) 1
  B) 2
  C) 3
  D) 4

[Cheesycrackers]

Answer to Question 1

A

Answer to Question 2

A

[cookcarl]

Thanks for the timely response, appreciate it

[dantucker]

Gracias!