Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal placesxP(x)00.310.120.230.4

Complete Question

Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places

           x        1        2         3           4          5

         P(x)      0     0.31     0.12     0.23       0.4

The value is  

Step-by-step explanation:

From the question we are told that

  The probability distribution is  

           x        1        2         3           4          5

         P(x)      0     0.31     0.12     0.23       0.4

So

                1           4         9          16           25  

Generally the mean is mathematically represented as

=>        

=>        

Generally  

=>  

=>  

Generally the variance of this probability distribution is

Generally the standard deviation of this probability distribution is  

=>    

=>    

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

congruent segments

step-by-step explanation: