Asked by A
the amount of jens month phone bill is normally distributed with a mean of $69 and a standard deviation of $10. what is 68.26% of phone bill between?
Answers
Answered by
Reiny
I just love this applet for this work, replaces all those nasty charts and tables in the back of text-books
http://davidmlane.com/hyperstat/z_table.html
click on "value from an area"
enter mean as 69
SD as 10
click on "between" to get
$59 and $79
http://davidmlane.com/hyperstat/z_table.html
click on "value from an area"
enter mean as 69
SD as 10
click on "between" to get
$59 and $79