Question

A computer selects a number X from 3 to 11 randomly and uniformly. Round all answers to 4 decimal places where possible. What is the distribution of X ? X ~ U( 3 Correct, 11 Correct) Suppose that the computer randomly picks 40 such numbers. What is the distribution of ¯ x for this selection of numbers. ¯ x ~ N( 3 Incorrect, Incorrect) What is the probability that the average of 40 numbers will be more than 7.1? Incorrect

Answer #1

Treat the number of months X after January 1 that someone is
born as uniformly distributed from 0 to 12. Round all answers to 4
decimal places where possible. What is the distribution of X ? X ~
U( , ) Suppose that 36 people are surveyed. What is the
distribution of ¯ x for this sample? ¯ x ~ N( , ) What is the
probability that the average birth month of the 36 people will be
more than...

7.)
Treat the number of months X after January 1 that someone is
born as uniformly distributed from 0 to 12. Round all answers to 4
decimal places where possible.
What is the distribution of XX? XX ~ U( , )
Suppose that 38 people are surveyed. What is the distribution
of ¯xx¯ for this sample? ¯xx¯ ~ N( , )
What is the probability that the average birth month of the 38
people will be more than 4.8?

Suppose that the age of students at George Washington Elementary
school is uniformly distributed between 5 and 11 years old. 45
randomly selected children from the school are asked their age.
Round all answers to 4 decimal places where possible.
What is the distribution of XX? XX ~ U(,)
Suppose that 45 children from the school are surveyed. Then the
sampling distribution is
What is the distribution of ¯xx¯? ¯xx¯ ~ N(,)
What is the probability that the average of...

The number of seconds XX after the minute that class ends is
uniformly distributed between 0 and 60. Round all answers to 4
decimal places where possible.
What is the distribution of XX? XX ~ U(,)
then the sampling distribution is
Suppose that 35 classes are clocked. What is the distribution
of ¯xx¯ for this group of classes? ¯xx¯ ~ N(,)
What is the probability that the average of 35 classes will end
with the second hand between 22 and...

Suppose that the age of students at George Washington Elementary
school is uniformly distributed between 6 and 10 years old. 35
randomly selected children from the school are asked their age.
Round all answers to 4 decimal places where possible.
What is the distribution of XX? XX ~ U(,)
Suppose that 35 children from the school are surveyed. Then the
sampling distribution is
What is the distribution of ¯xx¯? ¯xx¯ ~ N(,)
What is the probability that the average of...

Each sweat shop worker at a computer factory can put together
4.9 computers per hour on average with a standard deviation of 0.8
computers. 43 workers are randomly selected to work the next shift
at the factory. Round all answers to 4 decimal places where
possible and assume a normal distribution.
What is the distribution of X ? X ~ N( 4.9 Correct, 0.8
Correct)
What is the distribution of ¯ x ? ¯ x ~ N( 4.9 Correct, .1220...

Values are uniformly distributed between 197 and 256.
*(Round your answers to 3 decimal places.)
**(Round your answer to 1 decimal place.)
(a) What is the value of f(x) for this distribution?
(b) Determine the mean of this distribution:
(c) Determine the standard deviation of this distribution:
(d) Probability of (x > 245) =
(e) Probability of (204 ≤ x ≤ 231) =
(f) Probability of (x ≤ 224) =

The average production cost for major movies is 58 million
dollars and the standard deviation is 18 million dollars. Assume
the production cost distribution is normal. Suppose that 10
randomly selected major movies are researched. Answer the following
questions. Give your answers in millions of dollars, not dollars.
Round all answers to 4 decimal places where possible. What is the
distribution of X ? X ~ N( 58 Correct, 18 Correct) What is the
distribution of ¯ x ? ¯...

The lengths of adult males' hands are normally distributed with
mean 195 mm and standard deviation is 7.1 mm. Suppose that 49
individuals are randomly chosen. Round all answers to 4 where
possible. What is the distribution of ¯ x ? ¯ x ~ N( , ) For the
group of 49, find the probability that the average hand length is
more than 196. Find the first quartile for the average adult male
hand length for this sample size. For...

The manager of a computer retails store is concerned that his
suppliers have been giving him laptop computers with lower than
average quality. His research shows that replacement times for the
model laptop of concern are normally distributed with a mean of 4
years and a standard deviation of 0.4 years. He then randomly
selects records on 36 laptops sold in the past. Round the answers
of following questions to 4 decimal places.
What is the distribution of X? X...

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