A Marine boot camp instructor recorded the time in which each of ...

[charchew]

A Marine boot camp instructor recorded the time in which each of 15 recruits completed an obstacle course both before and after basic training. To test whether any improvement occurred, the instructor would use a t-distribution with 15 degrees of freedom.
  Indicate whether the statement is true or false

Question 2

The time series component that reflects a long-term, relatively smooth pattern or direction exhibited by a time series over a long time period (more than one year) is called:
 a. random variation c. seasonal variation
  b. cyclical variation d. long-term trend

[Silverbeard98]

Answer to Question 1

F

Answer to Question 2

D

[charchew]

Excellent

[miss.ashley]

TYSM