Question

The average height of adult American men is 69" with a standard deviation of 3". If samples of 50 men are taken:

a. What is the mu of the x bars?

b. What is the sigma of the x bars?

c. What is the probability that the next x bar is less than 68 inches?

d. What is the height below which you will find 75% of the x bars?

Answer #1

The distribution of heights of adult men is approximately normal
with mean 69 inches and standard deviation of 2.5
inches.
a. What percent of men are shorter than 66 inches?
b. The distribution of heights of adult men is approximately
normal with mean 69 inches and standard deviation of 2.5 inches.
What is the probability that a man is taller than 74 inches?
c.. What is the probability that a man is between 70 and 72
inches tall?

The average height of an adult American woman is 64 inches.
Assume that σ= 3.1 inches. A sample of 39 adult American women was
taken. What is the probability that the x¯ was less than 65 inches
for this sample?
A. Can’t work this; normality of x¯ not
satisfied
B. 0.6265
C. 0.9780
D. 0.0220
The number of eggs that a female house fly lays during her
lifetime is normally distributed with mean 840 and standard
deviation 96. Random samples...

The mean height of adult men is about 175 centimeters (cm) with
standard deviation 7 cm. The mean height of adult women is about
160 cm with standard deviation 6 cm.
If a man and a woman are both 166.5 cm tall, which person’s
height is more rare with respect to other people of the same sex?
How do you know?
8. Public health statistics indicate that 26% of adults in the
US smoke cigarettes.
(a) Sketch the sampling distribution...

An airliner carrier 400 passengers and has doors 75 inches
height of men are normally distributed with a mean of 69 and a
standard deviation of 2.8 is half of the 400 passengers are men
find the probability that the mean height of 200 man is less than
75 inches?

A large study of the heights of 920 adult men found that the
mean height was 71 inches tall. The standard deviation was 7
inches. If the distribution of data was normal, what is the
probability that a randomly selected male from the study was
between 64 and 92 inches tall? Use the 68-95-99.7 rule (sometimes
called the Empirical rule or the Standard Deviation rule). For
example, enter 0.68, NOT 68 or 68%.

Suppose the heights of 18-year-old men are approximately
normally distributed, with mean 69 inches and standard
deviation 6 inches.
(b) If a random sample of twenty-seven 18-year-old men is selected,
what is the probability that the mean height x is between
68 and 70 inches? (Round your answer to four decimal
places.)

Heights of men follow a normal distribution with an average of
69" and a standard deviation of 2.8" (Iím rounding to make the
arithmetic easier).
1. This indicates that the central 68% of men are from to
tall.
2. What percentage of men are between 69" and 71.8"
tall?

According to the internet, the average (mean) height of adult
men in the U.S. is 69.3 inches tall (about 5 foot, 9 inches tall).
That seems wrong to me, and so I decide to test whether or not that
is true by measuring the heights of a random sample of 63 adult
men. I find that my sample of 63 women has a mean height of 71.2
inches, and a standard deviation of 1.2 inches.
Answer the following questions in...

According to the internet, the average (mean) height of adult
men in the U.S. is 69.3 inches tall (about 5 foot, 9 inches tall).
That seems wrong to me, and so I decided to test whether or not
that is true by measuring the heights of a random sample of 63
adult men. I find that my sample of 63 women has a mean height of
71.2 inches and a standard deviation of 1.2 inches.
Answer the following questions in...

rhe
average height of men in the united states is 70inch with a
standard deviation of 4 inches. what proportion of men are 67
inches or taller?
A) .7500
B) .2500
C) .7734
D) .2266

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