You are tasked with assessing the impact of the number of Twitter followers on re-tweeting activity. You refer to your notes on regression and assign the X variable as the number of followers (independent variable). You set the Y variable as the number of retweets (dependent variable). The regression model you run is as follows: Y = X*b + e. You run the regression in excel and find that the b coefficient is 0.01. Furthermore, your tests for significance indicate that the p-value is 0.23. You conclude that:

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?

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup