Complete the chart to find the mean, variance, and standard deviation. Remember to use commas and round numbers to the nearest tenth. X
X
X - X
(X - X )2
1. 45 = -357.5=
The mean is
2. 340 = -62.5=
The median is
3. 400 = -2.5=
The variance is
4. 825 = 422.5=
The standard deviation is

Σ X =
_
X =
_
Σ (X - X)2 = 310,225.2
n =

yes

step-by-step explanation:

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560