Homework Help: HELP PLZ MATH

Posted by Nick on Monday, December 31, 2012 at 11:17am.

A recent article in the Myrtle Beach Sun Times reported that the mean labor cost to repair a color television is $90 with a standard deviation of $22. Monte's TV Sales and Services completed repairs on two sets this morning. The labor cost for the first was $75 and it was $100 for the second. COmpute the values for each and comment on your finding.

HELP PLZ MATH - Writeacher, Monday, December 31, 2012 at 12:17pm
You will need to "compute the values" yourself, but I see one thing to include in your comments: Both $75 and $100 are within the "standard deviation of $22." What do you think that means?
HELP PLZ MATH - PsyDAG, Monday, December 31, 2012 at 12:31pm
Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z scores.

Then you can comment.

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