December 11th/09 - Z-Scores

So today we had metal math and after he came around and gave a homework check for the 1st question in the Statistics Review Booklet. After giving the homework check, he corrected the question with us. You can solve Normal Distributions either by calculator or a site called www.ronblond.com. When you use your calculator you go 2nd VARS and normalcdf(. You enter four numbers into your calculator, first you put the lowest value, then the highest, then the mean, and finally the standard deviation. Note: If you like using spreadsheets to solve problems there is a STATISTICS spreadsheet located in "stuff you can use on the exam". We then started a new lesson called Z-scores. The equation for Z-Scores is Z=x-mean) divided by the standard deviation. It is pretty straight forward and goes along side with the Normal Distribution lesson. The assignment for today is to finish 9,13 and do 2.