Question
In: Statistics and Probability
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 is correct. You took a sample of 16 women and average number of children for this group is 2.4. Prepare a confidence Interval for the mean number of children for a woman.
Solutions
orchestra answered 2 years agoRelated Solutions
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."
what is sampling risk and why is it important to understand the risk of sampling? you...
what is sampling risk and why is it important to understand the
risk of sampling? you may use an example .
. 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...
Customers arrive at a grocery store at an average of 2.2 per minute. Assume that the...
Customers arrive at a grocery store at an average of 2.2 per
minute. Assume that the number of arrivals in a minute follows the
Poisson distribution. Provide answers to the following to 3 decimal
places.
Part a)
What is the probability that exactly two customers arrive in a
minute?
Part b)
Find the probability that more than three customers arrive in a
two-minute period.
Part c)
What is the probability that at least seven customers arrive in
three minutes, given...
The mean number of shopping trips per week in a county is 2.2. In a particular...
The mean number of shopping trips per week in a county is 2.2.
In a particular neighborhood within the county, a survey based on
50 people reveals that the mean in the neighborhood is 1.85, with a
standard deviation of 1.2. Test the null hypothesis that the mean
in the neighborhood is no different from that in the county. State
the null and alternative hypotheses, find the test statistic,
compare it with the critical value, make a decision, and find...
You want to test if children will exhibit a higher number of aggressive acts after watching...
You want to test if children will exhibit a higher number of
aggressive acts after watching a violent television show. The
number of aggressive acts for the same 19 participants before and
after watching the show are as follows:
BEFORE AFTER
4 5
6 6
3 4
2 4
4 7
1 3
0 2
0 1
4 5
1 3
2 2
0 4
2 4
5 3
3 6
3 2
1 3
0 2
5 1
Paired...
What do you understand by backward children.
What do you understand by back ward children? How to remove backwardness.
The number of accidents per week at a hazardous intersection varies with mean 2.2 and standard...
The number of accidents per week at a hazardous intersection
varies with mean 2.2 and standard deviation 1.4. The distribution
takes only whole-number values, so it is certainly not normal.
A) Let x-bar be the mean number of accidents at the intersection
during a year (52 weeks). What is the approximate probability that
x-bar is less than 2?
B) what is the approximate probability that there are fewer than
100 accidents at the intersection in a year? Hint: re-state the...
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