Suppose that the distribution of scores was approximately bell-shaped and that the standard deviations was approximately 47

OlmekinjP

OlmekinjP

Answered question

2021-10-04

The national average for mathematics on a standardized test in 2011 was 524. Suppose that the distribution of scores was approximately bell-shaped and that the standard deviations was approximately 47. Round your answers to one decimal place.

Answer & Explanation

AGRFTr

AGRFTr

Skilled2021-10-05Added 95 answers

φ=524
σ=47
99.7% of score is z=±2.97
As, φz×σandφ+z×σ, then
1) =5242.97×47=
=384.4
and
2) =524+2.97×47=
=633.6

Do you have a similar question?

Recalculate according to your conditions!

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?