MATH 221 Week 4 Discussion | Devry University
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- 20 Jan 2022
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MATH 221 Week 4 Discussion | Devry University
1. Using
these 20 data points from a normal distribution, find their μ and σ. Then
find P(x<20). Compare that probability with the percent of the 20 data
points that are below 20.
22.1 30.9
18.6 34.7 15.3
37.1 40.8 33.9
40.8 18.1 15.1
32.6 30.3 28.3
28.3 23.1 28.4
20.7 25.1 22.1
2. Using
these 20 data points from a normal distribution, find their μ and σ. Then
find P(20<x<35). Compare that probability with the percent of the
20 data points that are between 20 and 35.
22.1 30.9
18.6 34.7 15.3 37.1
40.8 33.9
40.8 18.1 15.1 32.6
30.3 28.3 28.3
23.1 28.4 20.7
25.1 22.1
3. Give an example of a
normally distributed variable that is found within your daily life.
Describe why it is a normally distributed variable.
4. Give an example of a
variable with a right skewed distribution that is found within your daily
life. Describe why it has a right skewed distribution.
5. Give an example of a
variable with a left skewed distribution that is found within your daily
life. Describe why it has a left skewed distribution.
6. Describe why each of
these variables is either discrete or continuous: Number of students in a
live lesson and the length of the live lesson
7. Describe why each of
these variables is either discrete or continuous: Paint cans sold and
paint used to cover walls.
8.
Use the Empirical Rule
to find the 68% range and find the percentage of data points in that range.
5 6 3 3 4
2 7 8 9 2 5 4
3 11 21 31 22 27 28 18
9. Use the Empirical Rule to find the 95% range and find the
percentage of data points in that range.
5
6 3 3 4 2 7 8 9 2
5 4 3 11 21 31 22
27 28 18
10. Ethics: Consider a manufacturing company that is counting the number of products completed. Consider that there were two products that were both half done and the company included the two halves as one additional completion in its count of products completed. What would be your argument for or against this presentation?
USA 
India