Post a New Question


posted by .

a mean score on a standardized test is 50 with a standard deviation of 10. What are the following:

1. what scores fall between -1 and +1 standard deviation?

2. what percent of all scores fall between -1 and +1 standard deviation?

3. what score falls at +2 standard deviations?

4. What percentage of scores falls between +1 and +2 standard deviations?

  • statistics -

    Z score is your score in terms of standard deviations.

    Z = (score-mean)/SD

    For the percentages, find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score. Multiply by 100 for the percentage.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question