171k views
4 votes
Please help me
and show me step by step​

Please help me and show me step by step​-example-1

1 Answer

6 votes

Answer:

6. mean = 1.4

7. variance = 1.64

standard deviation = √1.64

Explanation:

6.


\textsf{mean }\mu=\[ \sum [x \cdot p(x)]


\mu = 0 x 0.4 + 1 x 0.1 + 2 x 0.2 + 3 x 0.3 = 1.4

7. see attached for completed table


\textsf{variance }\sigma^2=\[ \sum [(x -\mu)^2 \cdot p(x)]

Therefore, variance is the total of the last column:


\sigma^2 = 0.784 + 0.016 + 0.072 + 0.768 = 1.64

standard deviation is the square root of variance:


\sigma=√(1.64)

Please help me and show me step by step​-example-1
User Nguyen Thanh Son
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories