Question

True or False

Calculating the mean for a probability distribution is very similar to calculating mean for frequency distribution.

Children born to one family is a binomial distribution with p = 1/2.

Answer #1

True or False:
10. The probability of an event is a value which must be greater
than 0 and less than 1.
11. If events A and B are mutually exclusive, then P(A|B) is always
equal to zero.
12. Mutually exclusive events cannot be independent.
13. A classical probability measure is a probability assessment
that is based on relative frequency.
14. The probability of an event is the product of the probabilities
of the sample space outcomes that correspond to...

True or False?
19. In a binomial distribution the random variable X is
discrete.
20. The standard deviation and mean are the same for the
standard normal distribution.
21. In a statistical study, the random variable X = 1, if the
house is colonial and X = 0 if the house is not colonial, then it
can be stated that the random variable is continuous. 22. For a
continuous distribution, P(X ≤ 10) is the same as P(X<10).
23. For...

1. True or False: If P(A) is the probability that an event A
will occur, then 0< (or equal to) P(A) < (or equal to)
2.
2.True or False: If S represents the sample space of a random
process, then P(S) =1
3. True or False: According toe the CLT, is a random variable X
does not have a normal distribution in a population, the
distribution of all sample means is approximately normal as long as
the sample size is...

1. TRUE OR FALSE: The t distribution is a family of
curves that vary with the degrees of freedom.
2. TRUE OR FALSE: The t distribution is a family of
curves that vary with the degrees of freedom.
3. The sample mean is an example of _________.
A. interval estimation
B. point estimation
C. confidence point
D. confidence numbers
3. How many t distributions are there?
A. 1
B. 2
C. 30
D. one for each value of df

1. Compute the mean and variance of the following probability
distribution. (Round your answers to 2 decimal
places.)
x
P(x)
4
0.10
7
0.25
10
0.30
13
0.35
2. Given a binomial distribution with n = 6 and π=
.25. Determine the probabilities of the following events using the
binomial formula. (Round your answers to 4 decimal
places.)
x = 2
x = 3
3. A probability distribution is a listing of all the outcomes
of an experiment and the...

Discrete Random Variables have either a finite or countable
number of values.
True
False
An example of continuous variables is bushels of wheat per
acre.
True
False
The Mean Value of a discrete probability distribution (denoted
by mu is a weighted average of the x-values AND represents the
average values of all possible outcomes.
True
False
Explain why in a binomial probability distribution, p + q =1.
Make one sentence work.

Investment in human capital is very similar to investing in
physical capital. True or false? Explain your answer.

32.
. (True, False, or Sometimes) (Check your
spelling!)
33. Determine whether a probability distribution is
given. If a probability distribution is given, find its mean.
(Round to the nearest thousandth). If a probability distribution is
not given, state (not a probability distribution). (Check your
spelling!)
x
P(x)
1
0.001
2
0.020
3
0.105
4
0.233
5
0.242
45. If two cards are drawn without replacement from a
deck, find the probability that the second card is a face card,...

A
discrete probability distribution uses variables that are
countable. true or false?

Assume each newborn baby has a probability of approximately 0.48
of being female and 0.52 of being male. For a family with three
children, let X=number of children who are girls.
a. Identify n and p for the binomial
distribution.
b. Find the probability that the family has two
girls and one boy.

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