Alvaro is interested in the relationship between weather conditions and whether the downtown train runs on time. For a year, he records whether each day is sunny, cloudy, rainy, or snowy, as well as whether this train arrives on time or is delayed

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

(23*2)-12=x     x=34

step-by-step explanation:

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)