Using an independent-measurest, the 90 confidence interval for ...

[magmichele12]

Using an independent-measurest, the 90 confidence interval for the difference between two population means ranges from 19 to 23 . Based on this confidence interval, how big is the difference between the two sample means?
 
  a. 4 points c. 21 points
  b. 19 points d. 23 points

Question 2

Two separate samples are being used to estimate the population mean difference between two treatment conditions. Which of the following would produce the widest confidence interval?
 
  a. n1 = n2 = 10 with a pooled variance of 10
  b. n1 = n2 = 10 with a pooled variance of 100
  c. n1 = n2 = 20 with a pooled variance of 10
  d. n1 = n2 = 20 with a pooled variance of 100

[jlaineee]

Answer to Question 1

C

Answer to Question 2

B

[magmichele12]

Thanks for the timely response, appreciate it

[lindahyatt42]

Gracias!