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anonymous

  • one year ago

Heights of men on a baseball team have a​ bell-shaped distribution with a mean of 175 cm and a standard deviation of 5 cm. Using the empirical​ rule, what is the approximate percentage of the men between the following​ values? (Part a and Part b, not answers choices) a. 160 cm and 190 cm b. 170 cm and 180 cm

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  1. anonymous
    • one year ago
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    Have you see this before? |dw:1442110512061:dw|

  2. anonymous
    • one year ago
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    Yes but I'm not sure how to use it to solve the question

  3. anonymous
    • one year ago
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    The first thing you should do is fill in the numbers at the bottom of the graph. µ = mean σ = standard deviation Put the mean in the middle, and add the standard deviation to the right Subtract the standard deviation to the left |dw:1442110705851:dw|

  4. anonymous
    • one year ago
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    Once you have that, just add up the percentages

  5. anonymous
    • one year ago
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    So for A you want to add up the percentages between 160 and 190|dw:1442110884768:dw|

  6. anonymous
    • one year ago
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    99.6%?

  7. anonymous
    • one year ago
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    I got 99.7%

  8. anonymous
    • one year ago
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    You are correct(: so I would basically do the same for part b right? fill in using the mean for b

  9. anonymous
    • one year ago
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    well the mean and standard deviation are the same for A and B. For b they're just looking for a different range, so this time only add the percentages between 170 and 180

  10. anonymous
    • one year ago
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    34%?

  11. anonymous
    • one year ago
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    thats 175-180. how do i know how much to add to get 170-180?

  12. anonymous
    • one year ago
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    If you notice, 170 is on there too, to the left of 175. So add 34 for 170 to 175 and another 34 for 175 to 180

  13. anonymous
    • one year ago
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    |dw:1442111563473:dw|

  14. anonymous
    • one year ago
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    ohhhhh, got it ! ^-^ thank youuuuuuuu

  15. anonymous
    • one year ago
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    you're welcome

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