Basics of ML & AL Week 2 Challenge

2.What is the significance of expected value when simple mean (Sum of all observations/number of observations) is already
in place.
Answer-Expected mean is weighted mean for random variables in a probability distribution.
Simple mean is average for a given sample.

3.Having skewness in the curve considered to be bad in the analysis?
Answer- It neither good or bad to have a skewness in the curve. its base on your sample data And Analysis.

4.Evaluate the probabilities for continuous normal distribution with given mean = 680 and standard deviation = 31
Answer- z =(x-mean)/standard deviation

I)P(X<711)
z = 1
84.12%

II)P(X>740)
z = 1.9 = 2
97.13%

III)P(600<x<720)
83.99%

IV)P(X=720
88.49%

5.Explain the curve on the right side
Answer- if we assume on x axis no of student And y axis their percentage.The right side of the normal distribution represents 34.1 % chance of finding best scoring student and 13.6% student finding lower score.