Answer: D
Step-by-step explanation:
Answer:
Thanks!
Step-by-step explanation:
Hey Again hows your day?
We have the following data set:
2,7,15,3,12,9,15,8,3,10
The range is the difference between the highest and lowest values in the set, to find the range, order the data set from least to greatest.
2,3,3,7,8,9,10,12,15,15
Then,
![\begin{gathered} \text{Range}=15-2 \\ \text{Range}=13 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20%5Ctext%7BRange%7D%3D15-2%20%5C%5C%20%5Ctext%7BRange%7D%3D13%20%5Cend%7Bgathered%7D)
Mean is represented by the following expression:
![\text{Mean}=\frac{\text{Sum of all data points}}{Number\text{ of data po}ints}](https://tex.z-dn.net/?f=%5Ctext%7BMean%7D%3D%5Cfrac%7B%5Ctext%7BSum%20of%20all%20data%20points%7D%7D%7BNumber%5Ctext%7B%20of%20data%20po%7Dints%7D)
![\text{Mean}=\frac{84}{10}=8.4](https://tex.z-dn.net/?f=%5Ctext%7BMean%7D%3D%5Cfrac%7B84%7D%7B10%7D%3D8.4)
Population variance formula looks like this:
![\begin{gathered} \sigma^2=\frac{\sum^{}_{}(x-\mu)^2}{N} \\ \text{where,} \\ \sigma^2=\text{population variance} \\ \sum ^{}_{}=addition\text{ of} \\ x=\text{each value} \\ \mu=population\text{ mean} \\ N=\text{ number of values in the population} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20%5Csigma%5E2%3D%5Cfrac%7B%5Csum%5E%7B%7D_%7B%7D%28x-%5Cmu%29%5E2%7D%7BN%7D%20%5C%5C%20%5Ctext%7Bwhere%2C%7D%20%5C%5C%20%5Csigma%5E2%3D%5Ctext%7Bpopulation%20variance%7D%20%5C%5C%20%5Csum%20%5E%7B%7D_%7B%7D%3Daddition%5Ctext%7B%20of%7D%20%5C%5C%20x%3D%5Ctext%7Beach%20value%7D%20%5C%5C%20%5Cmu%3Dpopulation%5Ctext%7B%20mean%7D%20%5C%5C%20N%3D%5Ctext%7B%20number%20of%20values%20in%20the%20population%7D%20%5Cend%7Bgathered%7D)
Then, substituting:
![\begin{gathered} \sigma^2=\frac{(2-14)^2+(3-14)^2+\cdots+(15-14)^2}{10} \\ \sigma^2=20.44 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20%5Csigma%5E2%3D%5Cfrac%7B%282-14%29%5E2%2B%283-14%29%5E2%2B%5Ccdots%2B%2815-14%29%5E2%7D%7B10%7D%20%5C%5C%20%5Csigma%5E2%3D20.44%20%5Cend%7Bgathered%7D)
For the standard deviation:
Answer:
2/5 or 0.4
Step-by-step explanation:
rise over run is 20/50, simplifies to 2/5
The given study is observational study
To gauge how strongly two variables are related to one another, correlation coefficients are used.
A statistical indicator of the strength of the association between the relative movements of two variables is the correlation coefficient. The values are in the -1.0 to 1.0 range. There was a measurement error in the correlation if the estimated value was larger than 1.0 or lower than -1.0. Perfect negative correlation is shown by a correlation of -1.0, and perfect positive correlation is shown by a correlation of 1.0. A correlation of 0.0 indicates that there is no linear link between the two variables' movements. Finance and investing can benefit from the usage of correlation statistics.
To know more about statistic indicator
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