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If there are 300 houseflies in the study, how many of them will live longer than 21 days?

If There Are 300 Houseflies In The Study How Many Of Them Will Live Longer Than 21 Days class=

Sagot :

The 48 flies of them will live longer than 21 days if there are 300 houseflies in the study.

What is a normal distribution?

It's the probability curve of a continuous distribution that's most likely symmetric around the mean. On the Z curve, at Z=0, the chance is 50-50. A bell-shaped curve is another name for it.

We have mean u = 18 days

SD = 3 days

X = 21 days

From the formula:

Z = (X - u)/SD

Z = (21 - 18)/3 = 1

P(x<21) = 0.84134

P(x>21) = 1 - P(x<21) = 0.15866

Number of flies = 300×0.15866 = 47.59 ≈ 48 flies

Thus, the 48 flies of them will live longer than 21 days if there are 300 houseflies in the study.

Learn more about the normal distribution here:

brainly.com/question/12421652

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