Question

1. The weights of 9 year old male children are normally
distributed population with a mean of 73 pounds and a standard
deviation of 12 pounds. Determine the probability that a random
sample of 21 such children has an average less than 72
pounds.

Round to four decimal places.

2. A normally distributed population has a mean of 80 and a
standard deviation of 17. Determine the probability that a random
sample of size 26 has an average greater than 72.

Round to four decimal places.

3. A normally distributed population has a mean of 77 and a
standard deviation of 18. Determine the probability that a random
sample of size 35 has an average between 71 and 81.

Round to four decimal places.

Answer #1

A normally distributed population has a mean of 72 and a
standard deviation of 14. Determine the probability that a random
sample of size 35 has an average greater than 73. Round to four
decimal places.

A normally distributed population has a mean of 500 and a
standard deviation of 60. a. Determine the probability that a
random sample of size selected from this population will have a
sample mean less than . 9 455 b. Determine the probability that a
random sample of size selected from the population will have a
sample mean greater than or equal to . 25 532 a. P x < 455 =
(Round to four decimal places as needed.) b....

Kindergarten children have heights that are approximately
normally distributed about a mean of 39 inches and a standard
deviation of 2 inches. If a random sample of 19 is taken, what is
the probability that the sample of kindergarten children has a mean
height of less than 39.50 inches? (Round your answer to four
decimal places.)

A normally distributed population has a mean of 58 and a
standard deviation of 18. Sample avergaes from samples of size 12
are collected. What would be the lower end of the centered interval
that contains 90% of all possible sample averages?
Round to the nearest hundredth
QUESTION 10
At a certain restaurant in Chicago, the average time it takes a
person to eat a nice dinner is 49 minutes with a standard deviation
of 18 minutes. These times are...

1/ A particular fruit's weights are normally distributed, with a
mean of 352 grams and a standard deviation of 28 grams.
If you pick 9 fruits at random, then 9% of the time, their mean
weight will be greater than how many grams?
Give your answer to the nearest gram.
2/A manufacturer knows that their items have a lengths that are
skewed right, with a mean of 7.5 inches, and standard deviation of
0.9 inches.
If 50 items are chosen...

Kindergarten children have heights that are approximately
normally distributed about a mean of 39 inches and a standard
deviation of 2 inches. If a random sample of 34 is taken, what is
the probability that the sample of kindergarten children has a mean
height of less than 39.50 inches? (Round your answer to four
decimal places.)
*PLEASE DOUBLE CHECK YOUR WORK, I HAVE BEEN GETTING ALOT OF
WRONG ANSWERS LATELY*

Assume that the population of weights of men is normally
distributed with mean 172 lb and standard deviation 29 lb. a. If an
individual man is randomly selected, find the probability that his
weight will be greater than 175 lb. (Round to four decimal places
as needed.) b. Find the probability that 20 randomly selected men
will have a mean weight that is greater than 175 lb. (Round to four
decimal places as needed.) show work

Suppose the heights of 18-year-old men are approximately
normally distributed, with mean 73 inches and standard deviation 2
inches. (a) What is the probability that an 18-year-old man
selected at random is between 72 and 74 inches tall? (Round your
answer to four decimal places.) (b) If a random sample of eleven
18-year-old men is selected, what is the probability that the mean
height x is between 72 and 74 inches? (Round your answer to four
decimal places.) (c) Compare...

In a large city, the heights of 10-year-old children are
approximately normally distributed with a mean of 53.7 inches and
standard deviation of 3.7 inches.
(a) What is the probability that a randomly chosen 10-year-old
child has a height that is less than than 50.35 inches? Round your
answer to 3 decimal places.
(b) What is the probability that a randomly chosen 10-year-old
child has a height that is more than 53.2 inches? Round your answer
to 3 decimal places.

Assume that the population of weights of men is normally
distributed with mean 172 lb and standard deviation 29 lb.
a. If an individual man is randomly selected,
find the probability that his weight will be greater than 175 lb.
(Round to four decimal places as needed.)
b. Find the probability that 20 randomly selected men will have
a mean weight that is greater than 175 lb. (Round to four decimal
places as needed.)
Please show all work as if...

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