Suppose the length of an oarfish is normally distributed with a mean of 6.5 m and a standard deviation of 1.5 m.

Which group describes 16% of the oarfish population?

Select each correct answer.


  • oarfish that are longer than 8 m
  • oarfish that are between 6.5 m and 9.5 m
  • oarfish that are between 3.5 m and 9.5 m
  • oarfish that are shorter than 5 m
adore.nuk  Feb 15, 2018

Here is a graph of a standard bell curve:  (ya just have to memorize the divisions)

6.5 m would be at the peak

Each line represents an oarfish 1.5 m shorter

The 16% total line is over to the left.....One line from the mean   6.5 - 1 line = 6.5-1.5 = 5 m

....so 16% are shorter than 5m

ElectricPavlov  Feb 15, 2018

9 Online Users


New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.