The Central Limit theorem states that the distribution of differences is

The Central Limit theorem states that the distribution of differences is
 
  a. always based on a pair of samples
  b. always based on a single sample
  c. a parameter
  d. approximately normal in shape

Question 2

The concept of the standard error of the mean implies that the estimated population standard deviation must yield a value which over-estimates the true mean.
 
  Indicate whether the statement is true or false

Question 3

A researcher wishes to estimate the reliability of the FYI (Functional Youth Indicator) - a new test of adolescent shyness.
 
  The test is composed of a total of 30 items, and the researcher splits the scoring in order to compare each subject's score on the odd numbered items with those on the even numbered items. A total of 10 teen-age males was randomly selected and their scores were as follows:
 
   Odd Even
  Subject  X Y
  1. 10 9
  2. 8 11
  3. 12 12
  4. 10 9
  5. 11 10
  6. 9 10
  7. 10 9
  8. 15 14
  9. 5 6
  10. 10 10
 
  Estimate the reliability of the whole test.
 
 
 What will be an ideal response?

Question 4

The concept of the standard error of the mean indicates that the actual population mean can never be a true parameter.
 
  Indicate whether the statement is true or false

Question 5

The estimated standard error of difference is an estimate of
 
  a. centrality
  b. variability
  c. normality
  d. none of these, since the estimated standard error of difference is not a
   statistic.