SD - mean

The mean is 10, and the standard deviation is 3.5. If the data set contains 40 data values, approximately how many of the data values will fall within the range of 6.5 to 13.5?

Correct answer:

x =  40

Step-by-step explanation:

n=40 m=10 s=3.5 D=13.56.5=7 q=D/s=7/3.5=2 x=0.6826 40=27.304=40



Did you find an error or inaccuracy? Feel free to write us. Thank you!



Showing 3 comments:
Ivo
Rule 1 sigma for a normal distribution (from the average on both sides distance standard deviation sigma) lies 68.26% of the values, if are normally distributed.

Math student
please I don't get the last part of the solution





Tips for related online calculators
Looking for help with calculating arithmetic mean?
Looking for a statistical calculator?
Looking for a standard deviation calculator?

You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1   video2

Related math problems and questions: