Which of the following is not a characteristic of Students' ...

[Redwolflake15]

Which of the following is not a characteristic of Students' t-distribution?
 
  A) depends on degrees of freedom.
  B) symmetric distribution
  C) For large samples, the t and z distributions are nearly equivalent.
  D) mean of 1

Question 2

Video games A headline in a local newspaper announced Video game playing can lead to better spatial reasoning abilities.
 
  The article reported that a study found statistically significant differences between teens who play video games and teens who do not, with teens who play video games testing better in spatial reasoning. Do you think the headline was appropriate? Explain.

[cici]

Answer to Question 1

D

Answer to Question 2

No, this was not a controlled experiment, so no determination of cause and effect can be made. Perhaps there is something about teens who play video games that make them good at video games and at spatial reasoning, or maybe teens with good spatial reasoning enjoy games more.