Suppose that a certain ant has a mean lifespan of 5.6 days with a standard deviation of 1.4 days. Assume that the lifespan of

Question

Suppose that a certain ant has a mean lifespan of 5.6 days with a
standard deviation of 1.4 days. Assume that the lifespan of this
insect is approximately normally distributed.
(a) Calculate the percentage of ants with a life-span
less than 4 days.
(b) Calculate the percentage of ants with a life-span
less than 7.4 days.
(c) Calculate the percentage of ants with a life-span
more than 4 days.
(d) Calculate the percentage of ants with a life-span
more than 7.4 days
(e) Calculate the percentage of ants with a life-span
between 4 and 7.4 days.
(n) Seventy percent of the ants will die within how
many days?
(g) Eight percent of ants will die within how many
days?
(h) After how many days are twenty percent of the
ants still alive?

Kunduz · Accepted Answer

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