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anonymous

  • 5 years ago

The weight, in grams, of the pair of kidneys in adult males between the ages of 40 and 49 have a bell-shaped distribution with a mean of 315 grams and a standard deviation of 35 grams. What percentage of kidneys weighs between 210 grams and 385 grams? Round your answer to the nearest integer.

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  1. mattfeury
    • 5 years ago
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    Are you taking a stats class? Are you familiar with the normal distribution?

  2. anonymous
    • 5 years ago
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    im taking a probability class....i was absent for the class and its due in 58 minutes

  3. mattfeury
    • 5 years ago
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    Do you know what a z-table is?

  4. anonymous
    • 5 years ago
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    no we where on mean median and mode the last time i was in class

  5. mattfeury
    • 5 years ago
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    Well this may be a little advanced, but not too much. You may have just missed that lesson heh. Take a lookie here: http://davidmlane.com/hyperstat/z_table.html you can put in the mean and std dev and interval. the area under the graph is the percentage you are looking for.

  6. mattfeury
    • 5 years ago
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    ...maybe. heh. i'm getting 47.96%. seems plausible.

  7. mattfeury
    • 5 years ago
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    (sorry. it's been a minute since my stats class.)

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