Question

A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 7.6 years, and standard
deviation of 2.1 years.

If 11 items are picked at random, 6% of the time their mean life
will be less than how many years?

Give your answer to one decimal place.

Answer #1

A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 5 years, and standard
deviation of 0.7 years.
If 20 items are picked at random, 6% of the time their mean life
will be less than how many years?
Give your answer to one decimal place.

A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 3.2 years, and standard
deviation of 0.7 years. If 12 items are picked at random, 10% of
the time their mean life will be less than how many years? Give
your answer to one decimal place.

A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 4 years, and standard
deviation of 1.1 years. If 17 items are picked at random, 4% of the
time their mean life will be less than how many years? Give your
answer to one decimal place.

A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 9.3 years, and standard
deviation of 2.7 years.
If 10 items are picked at random, 7% of the time their mean life
will be less than how many years?
Give your answer to one decimal place.

A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 12.8 years, and standard
deviation of 2.4 years. If 22 items are picked at random, 7% of the
time their mean life will be less than how many years? Give your
answer to one decimal place.

A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 3.9 years, and standard
deviation of 1.2 years. If 7 items are picked at random, 5% of the
time their mean life will be less than how many years? Give your
answer to one decimal place.

a manufacturer knows that their items have a normally
distributed lifespan, with a mean of 11.7 years, and standard
deviation of 0.7 years. if 6 items are picked at random, 10% of the
time their mean life will be less than how many years?

QUESTION PART A: A manufacturer knows that their items have a
normally distributed lifespan, with a mean of 6.6 years, and
standard deviation of 0.8 years.
If 22 items are picked at random, 6% of the time their mean life
will be less than how many years?
Give your answer to one decimal place.
QUESTION PART B: A particular fruit's weights are normally
distributed, with a mean of 679 grams and a standard deviation of
19 grams.
If you pick...

A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 12.8 years, and standard
deviation of 2.9 years. If 5 items are picked at random, 2% of the
time their mean life will be less than how many years?

A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 2.3 years, and standard
deviation of 0.6 years.
The 6% of items with the shortest lifespan will last less than how
many years?
Give your answer to one decimal place.

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