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August 30, 2014

Posted by **najma** on Saturday, November 5, 2011 at 7:25pm.

I) A steak that has an uncooked weight of more than 10 ounces?

II) A steak that has an uncooked weight of more than 9.5 ounces?

III) A steak that has an uncooked weight of less than 10.5 ounces?

IV) In the population of uncooked steaks, what is:

a) The minimum weight of the heaviest 20% of the steaks?

b) The maximum weight of the lightest 10% of the steaks?

V) A group of four friends visit the pub and each of them orders a 'Steak Special'. What is the probability that the mean uncooked weight of the steaks they order is more than 10 ounces?

- statistics -
**PsyDAG**, Sunday, November 6, 2011 at 12:20pmZ = (score-mean)/SD

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

For V, use Z = (score-mean)/SEm

SEm = SD/√n

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