An area rug in Rachel's room is shown below. A rectangle that is one hundred forty-four inches long and one hundred eight inches
1 answer:
Answer:
42 feet
Step-by-step explanation:
1) remeber how 1 foot=12 inches
we need to find "x" feet for 144 inches
so
2) cross multiply
144=12x
divide both sides by 12
12=x
so 144 inches is 12 feet, we need to do the exact same thing for the width
108=12x
9=x
the length is 12 feet and width is 9 feet
to find perimeter:
2(l)+2(w)
2*12+2*9
24+18=42
Hope this helps!
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Answer:
a)0,45119
b)1
Step-by-step explanation:
For part A of the problem we must first find the probability that both people in the couple have the same birthday (April 30)
Now the poisson approximation is used
λ=nP=80000*1/133225=0,6
Now, let X be the number of couples that birth April 30
P(X ≥ 1) =
1 − P(X = 0) =
P(X ≥ 1) = 0,45119
B) Now want to find the
probability that both partners celebrated their birthday on th, assuming that the year is 52 weeks and therefore 52 thursday
Now the poisson approximation is used
λ=nP=80000*52/133225=31.225
Now, let X be the number of couples that birth same day
P(X ≥ 1) =
1 − P(X = 0) =
P(X ≥ 1) = 1
Answer:
a) represent the real population proportion of people who showed partial or complete resistance to the antibiotic
b) represent the estimated proportion of people who showed partial or complete resistance to the antibiotic
c) We are confident (95%) that the true proportion of individuals in Florida diagnosed with a strep infection was tested for resistance to the antibiotic penicillin present partial or complete resistance to the antibiotic is between 54.5% to 59.1%.
Step-by-step explanation:
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
Part a
Description in words of the parameter p
represent the real population proportion of people who showed partial or complete resistance to the antibiotic
represent the estimated proportion of people who showed partial or complete resistance to the antibiotic
n=1714 is the sample size required
represent the critical value for the margin of error
The population proportion have the following distribution
Part b
Numerical estimate for p
In order to estimate a proportion we use this formula:
where X represent the number of people with a characteristic and n the total sample size selected.
represent the estimated proportion of people who showed partial or complete resistance to the antibiotic
Part c
The confidence interval for a proportion is given by this formula
For the 95% confidence interval the value of and
, with that value we can find the quantile required for the interval in the normal standard distribution.
And replacing into the confidence interval formula we got:
And the 95% confidence interval would be given (0.545;0.591).
We are confident that about 54.5% to 59.1% of individuals in Florida diagnosed with a strep infection was tested for resistance to the antibiotic penicillin present partial or complete resistance to the antibiotic.