Use technology or a z-distribution table to find the indicated area. The scores on a standardized exam are normally distributed with a mean of 400 and a standard deviation of 50. Approximately 40% of the scores are greater than which score?

A. 370

B. 387

C. 413

D. 430

NeewUseer128 Apr 19, 2021

#1**0 **

Don't know much about this, but here's my best shot. On the z score table, 40% corresponds roughly with a z-score of ... z score = score - mean. ______. std deviation ... 50 (.25) = score - 400 add 400 to both sides ... 412.5 = score ≈ 413.

The beautiful thing about learning is that no one can take it away from you. ~ **Hannah🌹🌹🌹**

XxMysteriousGirlxX Apr 19, 2021

#3**+1 **

Here is a simple little site that I like.

Put the numbers in and it will spit our your answer.

https://davidmlane.com/hyperstat/z_table.html

Melody Apr 19, 2021