A.
b.
c.
d.
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f.
g, h.
For
, recall that ![\mathbb E[X]=\mu_X=np](https://tex.z-dn.net/?f=%5Cmathbb%20%0AE%5BX%5D%3D%5Cmu_X%3Dnp)
and ![\mathbb V[X]={\sigma_X}^2=np(1-p)](https://tex.z-dn.net/?f=%5Cmathbb%20V%5BX%5D%3D%7B%5Csigma_X%7D%5E2%3Dnp%281-p%29)
. So
b.
c.
d.
e.
f.
g, h.
For
Becky adds 3/4 gallon of gasoline into her snow thrower's empty fuel tank. She uses 1/4 gallon for the snowstorm on Friday, and
1 answer:
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Answer:
And the confidence interval for this case
Step-by-step explanation:
We know the following info from the problem
sample mean for the group 1
the standard deviation for the group 1
the sample size for group 1
sample mean for the group 2
the standard deviation for the group 2
the sample size for group 2
We have all the conditions satisifed since we have random samples.
We want to construct a confidence interval for the true difference of means and the correct formula for this case is:
The degrees of freedom are given :
The confidence level is 0.9 or 90% and the significance level is and
and the critical value for this case is:
And replacing the info given we got:
And the confidence interval for this case
The quotient of the number given number 7 Superscript negative 1 Baseline Over 7 Superscript negative 2 Baseline is 7.
<h3>What is the quotient?</h3>Quotient is the resultant number which is obtain by dividing a number with another. Let a number a is divided by number b. Then the quotient of these two number will be,
Here, (<em>a, b</em>) are the real numbers.
The number StartFraction 7 Superscript negative 1 Baseline Over 7 Superscript negative 2 Baseline EndFraction, given can be written as,
Let the quotient of this division is n. Therefore,
A number in numerator of a fraction with negative exponent can be written in the denominator with the same but positive exponent and vise versa. Therefore,
Hence, the quotient of the number given number 7 Superscript negative 1 Baseline Over 7 Superscript negative 2 Baseline is 7.
Learn more about the quotient here;