Answer:
$240
Step-by-step explanation:
Reduction price = 20% of 300
![= \frac{20}{100}*300\\= 20*3\\\\= $ 60](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B20%7D%7B100%7D%2A300%5C%5C%3D%2020%2A3%5C%5C%5C%5C%3D%20%24%2060)
Sale price = 300 - 60
= $ 240
Answer:
$16.05
Step-by-step explanation:
1.07*15
Answer:
1. Change each number to an improper fraction.
2. Simplify if possible.
3. Multiply the numerators and then the denominators.
4. Put answer in lowest terms.
Step-by-step explanation:
3"11 + 4"8
If you add them you would get 7"19 which can't happen so you would take 12 of the inches out of 19 and make it another foot leaving you at 8"7
Combined, the two boxes are eight foot seven
Answer:
Where
the mean and
the deviation
Since the distribution for X is normal then we can conclude that the distribution for the sample mean
is given by:
![\mu_{\bar X} = \mu](https://tex.z-dn.net/?f=%20%5Cmu_%7B%5Cbar%20X%7D%20%3D%20%5Cmu)
![\sigma_{\bar X}= \frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=%5Csigma_%7B%5Cbar%20X%7D%3D%20%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
Step-by-step explanation:
Previous concepts
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".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:
Where
the mean and
the deviation
Since the distribution for X is normal then we can conclude that the distribution for the sample mean
is given by:
![\mu_{\bar X} = \mu](https://tex.z-dn.net/?f=%20%5Cmu_%7B%5Cbar%20X%7D%20%3D%20%5Cmu)
![\sigma_{\bar X}= \frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=%5Csigma_%7B%5Cbar%20X%7D%3D%20%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)