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anonymous

  • one year ago

A health food store has launched a new pack of vitamins for children. The store records the number of packs ordered by a random sample of 100 online customers and the number of packs ordered by a random sample of 100 walk-in customers.

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    Which of the following inferences can be drawn about the buying pattern of the online customers versus that of the walk-in customers? Online customers buy an average of five packs compared with walk-in customers, who buy an average of three packs. Online customers buy an average of five packs compared with walk-in customers, who buy an average of two packs. Online customers buy an average of six packs compared with walk-in customers, who buy an average of three packs. Online customers buy an average of six packs compared with walk-in customers, who buy an average of two packs.

  3. anonymous
    • one year ago
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    @Michele_Laino @Vocaloid

  4. welshfella
    • one year ago
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    Count the total number of packs bought by on-line customers and the same for walk-in. You can then find the average number of packs per customer by dividing the above totals by the number of customers

  5. anonymous
    • one year ago
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    OK

  6. welshfella
    • one year ago
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    Number packs for on-line customers = 5*6 + 4*5 + 4 = ?

  7. anonymous
    • one year ago
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    54 @welshfella

  8. anonymous
    • one year ago
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  9. Michele_Laino
    • one year ago
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    the mean of online customers is: \[\Large \frac{{\left( {4 \cdot 1} \right) + \left( {5 \cdot 4} \right) + \left( {6 \cdot 5} \right)}}{{10}} = ...?\]

  10. welshfella
    • one year ago
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    54 is right so divide that by 10 to get the mean for online customers

  11. Michele_Laino
    • one year ago
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    whereas the mean of walk-in customers is: \[\Large \frac{{\left( {3 \cdot 2} \right) + \left( {3 \cdot 6} \right) + \left( {4 \cdot 1} \right)}}{{10}} = ...?\]

  12. anonymous
    • one year ago
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    28?

  13. Michele_Laino
    • one year ago
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    yes! and 28/10=...?

  14. anonymous
    • one year ago
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    2.8

  15. Michele_Laino
    • one year ago
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    correct! which can be rounded off to 3

  16. Michele_Laino
    • one year ago
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    whereas the mean of online customers is 54/10=...?

  17. anonymous
    • one year ago
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    5.4

  18. Michele_Laino
    • one year ago
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    correct! and it can be rounded off to 5

  19. Michele_Laino
    • one year ago
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    so, what is the right option?

  20. anonymous
    • one year ago
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    A.

  21. Michele_Laino
    • one year ago
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    that's right!

  22. anonymous
    • one year ago
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    thank you so much! :)

  23. Michele_Laino
    • one year ago
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    :)

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