Posted by **John** on Monday, February 8, 2010 at 9:52pm.

Five friends go bowling and finish with the following scores. Jim bowls a 129, Bob bowls a 150, Ann bowls a 133, Tom bowls a 162 and Gina bowls a 148. Find Tom's z-score. Treat the data as a population. Don't forget to round to the nearest tenth.

The book says value-mean divided by sd. I have no idea what sd is.

- Statistics -
**Kendra**, Monday, February 8, 2010 at 10:20pm
sd=standard deviation

- Statistics -
**John**, Monday, February 8, 2010 at 10:54pm
oh thank you.

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