In a normal distribution with standard deviations, how is the ...

[fox]

In a normal distribution with standard deviations, how is the area designated in which 47.5 of scores are higher than the mean and 47.5 are lower than the mean?
 
  a. one standard deviation above and below
  b. two standard deviations above and below
  c. three standard deviations above and below
  d. the score reflecting the mean, median, and mode

Question 2

Which of the following is used when data collection involves unlike data, such as a measurement of bone density compared to obesity measured as a percentage of body fat?
 
  a. alpha
  b. standard deviation
  c. t test
  d. z scores

[6ana001]

Answer to Question 1

b. two standard deviations above and below

Answer to Question 2

d. z scores

[fox]

Excellent

[mammy1697]

Thanks for the timely response, appreciate it