When estimating a confidence interval for the difference between ...

[rl]

When estimating a confidence interval for the difference between 2 means using the method where sample variances are pooled, which of the following assumptions is not needed?
 
  A) The populations are normally distributed.
  B) The populations have equal variances.
  C) The samples are independent.
  D) The sample sizes are equal.

Question 2

In estimating a population proportion, the factors that are needed to determine the required sample size are the confidence level, the margin of error and some idea of what the population proportion is.
 
  Indicate whether the statement is true or false

[cloudre37]

Answer to Question 1

D

Answer to Question 2

TRUE

[rl]

Correct answers!

[cloudre37]

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