Question
In: Statistics and Probability
it has been reported that the average number of children per family in the united staes...
it has been reported that the average number of children per family in the united staes is 2.3 per family. since the random variable "number of children"is discrete, justify reporting the value "2.3."
Solutions
orchestra answered 1 year agoRelated Solutions
. A certain town has 25,000 families. The average number of children per family is 2.4...
. A certain town has 25,000 families. The average number of
children per family is 2.4 with an SD of 1.1 . Also, 20% of the
families have no children at all. A random sample of 400 families
from that town is drawn.
a) Find the expected value and the standard error for the
percentage of families chosen without children?
b) Estimate the chance that somewhere between 17% and 19% of the
sample families will have no children?
c) Find...
. A certain town has 25,000 families. The average number of children per family is 2.4...
. A certain town has 25,000 families. The average number of
children per family is 2.4 with an SD of 1.1 . Also, 20% of the
families have no children at all. A random sample of 400 families
from that town is drawn.
a) Find the expected value and the standard error for the
percentage of families chosen without children?
b) Estimate the chance that somewhere between 17% and 19% of the
sample families will have no children?
c) Find...
1. A certain town has 25,000 families. The average number of children per family is 2.4...
1. A certain town has 25,000 families. The average number of
children per family is 2.4 with an SD of 1.1 . Also, 20% of the
families have no children at all. A random sample of 400 families
from that town is drawn.
a) Find the expected value and the standard error for the
percentage of families chosen without children?
b) Estimate the chance that somewhere between 17% and 19% of the
sample families will have no children?
c) Find...
Estimate, by simulation, the average number of children there would be in a family if all people had children until they had a girl.
in R.
Estimate, by simulation, the average number of children there would be in a family if all people had children until they had a girl. Do the same if all people had children until they had at least one boy and at least one girl. How many more children would you expect to find under the second scheme than under the first in 100,000 families? (Assume that girls and boys are equally likely.)
The average number of graduates for a school district has been 250 per year with a...
The average number of graduates for a school district has been
250 per year with a standard deviation of 30. What is the
probability that the number of graduates next year will be:
a. Less than 220
b. Less than 325
c. Less than 285
d. More than 238
e. More than 300
f. More than 325
You want to understand sampling distribution. The average number of children per woman is 2.2 with...
You want to understand sampling distribution. The average
number of children per woman is 2.2 with a standard deviation is
.1. If you took a sample of 16 women, what is the probability that:
The average of this group is less that 2.3?
The average for this group is greater than 2.45?
The average for this group lies between 2.15 and
2.4.
(10)
You are not sure if the mean value is correct but you believe
that the standard deviation...
1. Suppose your average number of work hours per year has been 2000 hours with a...
1. Suppose your average number of work hours per year
has been 2000 hours with a standard deviation of 118 hours. Please
graph and calculate the probability you will work between 1900
hours and 2300 hours next year. Hint: Two Zs and be ready to add.
Use the “old” Z formula for this problem.
2. Based on the information in Problem #1, please
calculate the probability you will work between 2300 and 2500 hours
next year. (again please use the...
In MAPLE or MATLAB A family with three children is chosen at random and the number...
In MAPLE or MATLAB
A family with three children is chosen at random and the number
X of daughters is counted. Describe how to
simulate an observation on X based on U ~
unif[0,1]. Then, simulate 20 observations on
X.
. It has been reported that the average credit card debt for college seniors at the...
. It has been reported that the average credit card debt for
college seniors at the college book store at a college or
univerisity is 3262 dollars. The student senate at a large
university feels that their seniors have a debt much less than
this, so it conducts a study of 50 randomly selected seniors and
find that the average debt is 2995 dollars. The population standard
deviation (sigma) is 1100 dollars. With an alpha of 0.05, is the
student...
"What do you think is the ideal number of children for a family to have?" A...
"What do you think is the ideal number of children for a family
to have?" A Gallup Poll asked this question of 1016 randomly chosen
adults. Almost half (49%) thought two children was ideal.† We are
supposing that the proportion of all adults who think that two
children is ideal is p = 0.49.
What is the probability that a sample proportion p̂ falls
between 0.46 and 0.52 (that is, within ±3 percentage points of the
true p) if the...
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