Posted by **SONIA GOVAN** on Monday, February 11, 2013 at 5:31pm.

ASSUME THE THE MEAN WEIGHT OF CHILDREN AGES 7 IS 50 POUNDS AND A STANDARD DEVIATION OF 10. wHAT IS THE PROBABLITY THAT A RANDOM SELECTED 7 YEAR OLD WILL HAVE A WEIGHT THAT IS LESS THAT 65

- STATISTICS -
**JJ**, Monday, February 11, 2013 at 6:45pm
You have to find the z-score.

65-50 = 15 then divide by 10 which is z = 1.5

You can then use a z-table or a stat calculator to find the probablity less than 65%

Depending on the table, you may want to find the probability of z = 1.5 or greater and then subtract that number from 1 to get the less than.

- STATISTICS -
**Kamryn**, Friday, June 6, 2014 at 8:47am
For a normal distribution, what is the probability of randomly selecting a z score greater than Z=- 2.0

## Answer this Question

## Related Questions

- Statisitics:Standard Deviation of Population and o - Standard Deviation of ...
- Statistics - Suppose that the birth weight of newborn babies in the U.S is ...
- Statistics - Suppose that the weight of male babies less than 2 months old is ...
- statistics - the weights of shells follow a normal distribution. a random sample...
- Statistics - 9. Assume the weight, W, of a randomly selected adult has a normal...
- STAT - The weights of the 100 students in an introductory statistics class are ...
- STAT - The weights of the 100 students in an introductory statistics class are ...
- statistics - Suppose that large dogs weights are normally distributed with a ...
- Statistics - 75 packages are randomly selected from packages received by a ...
- statistics - . A new diet is claimed to increase the speed of weight loss. A ...

More Related Questions