Answer:
13
Step-by-step explanation:
2x-4=4x-30
-2x= -26
-2x/2 =26/2
x=13
Answer:
Mean
Step-by-step explanation:
Given
![Data: 4, 4, 2, 4, 4, 1, 3, 4, 2, 4](https://tex.z-dn.net/?f=Data%3A%204%2C%204%2C%202%2C%204%2C%204%2C%201%2C%203%2C%204%2C%202%2C%204)
Required
Best measure of center
The mean is considered the best measure of center when there are no outliers in the given data.
Outlier is when a particular data set is far away from other datasets.
For instance: 20 is an outlier in the following data sets: ![4, 4, 2, 20, 4, 4, 1, 3, 4, 2, 4](https://tex.z-dn.net/?f=4%2C%204%2C%202%2C%2020%2C%204%2C%204%2C%201%2C%203%2C%204%2C%202%2C%204)
Also, the given data are not open-ended.
An open-ended data is as follows: ![1, 2, 3, 4, 5\ or\ more](https://tex.z-dn.net/?f=1%2C%202%2C%203%2C%204%2C%205%5C%20or%5C%20more)
Since we do not have any of the above conditions, then the mean is the best center to use.
Answer:
Define two roughly identical sets.
Reduce the chance of bias.
Step-by-step explanation:
In this experiment, Daniel performs a random assignment in order to stablish two separate groups with roughly equivalent ability to do barbell curls. Two different treatments (verbal encouragement and silence) are then applied in order to verify for a cause and effect relationship. If the groups were not randomly assigned, then the experiment could be biased.
Answer:
1. 19
2. 42.5
3. 13
4. 5=1
5. 34
(I'm not sure about 4 though)