Question

A manufacturer knows that their items have a normally distributed length, with a mean of 7.7 inches, and standard deviation of 1.7 inches.

If 7 items are chosen at random, what is the probability that their mean length is less than 9.2 inches?

Answer #1

A manufacturer knows that their items have a normally
distributed length, with a mean of 9.2 inches, and standard
deviation of 2 inches. If 11 items are chosen at random, what is
the probability that their mean length is less than 9.9 inches?
round to 4 decimal places. & A manufacturer knows that their
items have a normally distributed lifespan, with a mean of 13.2
years, and standard deviation of 2.4 years. If you randomly
purchase 11 items, what is...

A manufacturer knows that their items have a normally
distributed length, with a mean of 12.2 inches, and standard
deviation of 3.7 inches.
If 7 items are chosen at random, what is the probability that their
mean length is less than 13.5 inches?

1.)A manufacturer knows that their items have a normally
distributed length, with a mean of 12.9 inches, and standard
deviation of 1.1 inches.
If one item is chosen at random, what is the probability that it is
less than 14.9 inches long?
2.)A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 5 years, and standard
deviation of 1.1 years.
If you randomly purchase one item, what is the probability it will
last longer than...

A manufacturer knows that their items have a normally
distributed length, with a mean of 19.5 inches, and standard
deviation of 1.6 inches.
If 7 items are chosen at random, what is the probability that their
mean length is less than 19.9 inches?________________
Round your answer to four decimal places.

A manufacturer knows that their items have a normally
distributed length, with a mean of 11 inches, and standard
deviation of 2.2 inches. If 23 items are chosen at random, what is
the probability that their mean length is less than 11 inches?

A manufacturer knows that their items have a normally
distributed length, with a mean of 11.5 inches, and a standard
deviation of 0.5 inches. If 19 items are chosen at random, what is
the probability that their mean length is less than 11.2
inches?

A manufacturer knows that their items have a normally
distributed length, with a mean of 16.3 inches, and standard
deviation of 4.5 inches.
If 3 items are chosen at random, what is the probability that their
mean length is less than 15.1 inches?

1)A manufacturer knows that their items have a normally
distributed length, with a mean of 13.8 inches, and standard
deviation of 3.7 inches.
If 9 items are chosen at random, what is the probability that their
mean length is less than 12.5 inches?

A manufacturer knows that their items have a normally
distributed length, with a mean of 6.8 inches, and standard
deviation of 0.7 inches. If 4 items are chosen at random, what is
the probability that their mean length is less than 7.2 inches?
(Give answer to 4 decimal places.)

A manufacturer knows that their items have a normally
distributed length, with a mean of 16.5 inches, and standard
deviation of 3.1 inches.
If 9 items are chosen at random, what is the probability that their
mean length is less than 18.4 inches? (Give answer to 4 decimal
places.)

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