The parallel histograms below display the heights of men in each of two countries. Men's Heights by Country
Countries
50 55 60 65 70 75 80 85 90
Height in Inches
Which of the following statements is true?
A. The IQR for the distribution of men's heights is larger for country A.
B. The range for the distribution of men's heights is larger in country A.
C. The standard deviation for the distribution of men's heights is smaller in country B.
D. Men's heights in country B are more variable than men's heights in country A.

Asmall (but heavy) particle placed in a glass of water will follow a zigzag motion because the particle will bounce off of the water molecules it meets. this is called brownian motion. a physicist simulates this on a computer, by varying the distance a particle can travel (called the mean free length), on average, before it collides with a water molecule and assigning the change in motion to be one of 8 directions, each with a similar probability. by running the simulated particle (with the same mean free length) many times she determines that it should take 15 seconds, on average, for the particle to fall to the bottom, with a standard deviation of 1.5 seconds. next she lets a real particle fall through a glass of water and finds that it took 18 seconds. what does she conclude, and why?

Kayla has a $500 budget for the school party.she paid $150 for the decorations.food will cost $5.50 per student. what inequality represents the number of students,s, that can attend the party?

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28