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Airida [17]
2 years ago
12

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 410 gram setting. It is

believed that the machine is underfilling the bags. A 22 bag sample had a mean of 408 grams with a standard deviation of 14. A level of significance of 0.05 will be used. Assume the population distribution is approximately normal. Is there sufficient evidence to support the claim that the bags are underfilled
Mathematics
1 answer:
Delvig [45]2 years ago
6 0

Answer:

i think it is 451 i believe

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5n + 3d = 420               ..............(i)

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Multiply equation (i)  by 3.

3*(5n + 3d) = 3*(420)

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Equation (ii)  minus (iii)

(12n + 9d) - (15n + 9d) =  1080 - 1260

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3d = 120

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