The probability that an individual has 20-20 vision is 0.19 0.19. in a class of 70 70 students, what is the mean and standard deviation of the number with 20-20 vision in the class? round to the nearest thousandth.

Formula to find mean and standard deviation is,

Means = np and standard deviation =.

Where n= sample size, p = probability.

According to the given problem, the probability that an individual has 20 vision is 0.19 in a class of 70 students. So,

p = 0.19 and n = 70.

Hence, the first step is to plug in these values in the above formula to get mean and standard deviation. Therefore,

Mean = np

= 70* 0.19

= 13.3

= 13.300 (Rounded to nearest thousandth.

Standard deviation =

=

=

=√10.773

=3.282224855

= 3.282 (Rounded to nearest thousandth).

step-by-step explanation:

is their an equation anywhere i can take a   look at it and see if i am right.

the answer for this question is a= 13,622.84

step-by-step explanation: