Asked by Sean
A statistics teacher believes that the final exam grade for her elementary stats class have a normal distribution with a mean of 82 and a standard deviation on 8.
Find the score which separates the top 10% of the scores from the lowest 90% of the scores.
Find the score which separates the top 10% of the scores from the lowest 90% of the scores.
Answers
Answered by
Reiny
z-score for 90
= (90-82)/8 = 1
so don't even have to go to tables or charts, we are 1 standard deviation from 82, so
a score of 90 will do it
= (90-82)/8 = 1
so don't even have to go to tables or charts, we are 1 standard deviation from 82, so
a score of 90 will do it
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.