What is the q1 of the following data? 202,199,223,198,223,223,301,199,200 ,215 A.301
B.212
C.223
D.199

Q1: 25% of the data set is below the first quartile Q2: 50% of the data set is below the second quartile Q3: 75% of the data set is below the third quartile Q1 is equal to the 25th percentile and is a measure of non-central location. Q2 is located at 50th percentile and equals the median (= measure of central tendency). Q3 is equal to the 75th percentile and is a measure of non-central location.

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.