Find the Least Commmon Denominator =LCD then multiply what u get for the bottom ex: 2/8X3/24 multiply 8*3 for 2/8= 6/24
PEMDAS (order of operations rules) require that we perform operations in a certain order: anything inside parentheses first, followed by any exponentiation, followed by mult. and div., finally followed by addition and subtraction.
Thus, we must evaluate 5+8÷4-1 first, as it's inside parentheses. Focusing on the division first, we get 5+8÷4-1 = 5 + 2 - 1, or 6.
Then we have 5 - [6], which comes out to -1.
If 5 jackets where bought and Maria paid $10 for shipping then each jacket would equal 12 because 12x5= 60+10= $70
Answer:
25
Step-by-step explanation:
We know that the standard error of the sampling distribution of sample means is
Standard error=standard deviation/√n
√n=standard deviation/Standard error
n=(standard deviation/Standard error)²
We are given that standard deviation=5 and standard error=1. So,
n=(5/1)²
n=5²
n=25.
Thus, the required sample size is 25.
Answer:
2.4
Step-by-step explanation:
We have to find the mean first
![Mean = \frac{Sum}{No.\ of\ values}\\ = \frac{2+4+7+2+3+7+9+3+1+7}{10}\\ = \frac{45}{10}\\ = 4.5](https://tex.z-dn.net/?f=Mean%20%3D%20%5Cfrac%7BSum%7D%7BNo.%5C%20of%5C%20values%7D%5C%5C%20%3D%20%5Cfrac%7B2%2B4%2B7%2B2%2B3%2B7%2B9%2B3%2B1%2B7%7D%7B10%7D%5C%5C%20%3D%20%5Cfrac%7B45%7D%7B10%7D%5C%5C%20%3D%204.5)
Now we have to find deviations.
Note that the deviations are calculated by subtracting the mean from the value. The distance is always positive so the deviations will be positive
Value Deviation
2 2-4.5 = |-2.5| = 2.5
4 4-4.5 = |-0.5| = 0.5
7 7-4.5 = 2.5
2 2-4.5 = |-2.5| = 2.5
3 3-4.5 = |-1.5| = 1.5
7 7-4.5 = 2.5
9 9-4.5 = 4.5
3 3-4.5 = |-1.5| = 1.5
1 1-4.5 = |-3.5| = 3.5
7 7-4.5 = 2.5
The last step is to find the mean of deviations.
![Mean\ of\ deviations = \frac{(2.5+0.5+2.5+2.5+1.5+2.5+4.5+1.5+3.5+2.5}{10}\\ = \frac{24}{10} \\=2.4](https://tex.z-dn.net/?f=Mean%5C%20of%5C%20deviations%20%3D%20%5Cfrac%7B%282.5%2B0.5%2B2.5%2B2.5%2B1.5%2B2.5%2B4.5%2B1.5%2B3.5%2B2.5%7D%7B10%7D%5C%5C%20%3D%20%5Cfrac%7B24%7D%7B10%7D%20%5C%5C%3D2.4)
The mean absolute deviation of given data set is 2.4 ..