#### • Class 11 Physics Demo

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#### • explain standard deviation statistics

Question:I am in my Statistics class and I need help understanding this variable. I know how to make a tree with it, but I can't do a tree everytime during a quiz.

Question:Graph #1: The speed of a car over time. http://i122.photobucket.com/albums/o249/lucky772/13_08_04.gif Describe what is happening in this graph. What does the flat part of the graph represent in this situation? Graph #2: The height of a ball thrown up in the air over time. http://i122.photobucket.com/albums/o249/lucky772/13_08_03-1.gif What is the maximum height that the ball reaches? Where is the ball (in terms of height) at the 6-second mark? When is the ball 2 feet off the ground? FULL POINTS. Please explain the answer, I would like to learn fo the future Thanks you!

Answers:Graph #2: for these answers all you need to do is look at the graph. 9 feet 0 feet (its on the ground) i would say about 0.4 sec and 5.8 sec

Question:I started Statistics in college the other day. I only have one written thing to do for the session tomorrow. As an activity the first day, we got everyone's height in that class and the color shirt they were wearing. We had to do 3 things with that data. For the height, we had to do an ordered array. Could someone explain how to do that? It's probably extremely simple. Also, for the color, we had to do a summary table, bar chart, and pie chart. I'm unclear on how to do that as well. I read the entire chapter in the book and took notes. I know how to do the bar graph. I'm pretty confused on how to set-up the pie chart, though. Any help would be greatly appreciated. My professor is from Kenya, so it's difficult to understand her.

Answers:well i can tell you how to do the pie chart for the color, its pretty easy, you divide how many of one color there is by all the students in the class. You need a protractor now, or some kind of program, but you times the decimal by 360 then you measure the product out on the protractor you have. then again, you dont have to listen to my, im only in 8th grade.

Question:Graph #1: The speed of a car over time. http://i122.photobucket.com/albums/o249/lucky772/13_08_04.gif Describe what is happening in this graph. What does the flat part of the graph represent in this situation? Graph #2: The height of a ball thrown up in the air over time. http://i122.photobucket.com/albums/o249/lucky772/13_08_03-1.gif What is the maximum height that the ball reaches? Where is the ball (in terms of height) at the 6-second mark? When is the ball 2 feet off the ground? FULL POINTS. Please explain the answer, I would like to learn fo the future Thanks you!

Answers:Graph one: Where the line is going up the car is accelerating (speed is increases). Where the line goes flat, the car is remaining at a constant speed (40mph). Graph two: At six seconds the ball is on the ground because the graph is crossing the x axis where x=6. The ball is 2 ft of the ground at about .33 secs and at about 5.66 secs. To find these draw a straight line out from the y axis at y=2 and see at what x values that line intersects the graph.