Checkpoint 4 by Joseph DeCapua https://padlet.com/jdecapua/moqv86g20axw en-us 2018-08-27 17:34:15 UTC 2025-12-30 15:20:06 UTC hello@padlet.com Definition of Correlation jdecapua https://padlet.com/jdecapua/moqv86g20axw/wish/275626705 Correlation is a statistical measure that indicates the extent to which two or more variables fluctuate together]]> 2018-08-27 17:37:43 UTC https://padlet.com/jdecapua/moqv86g20axw/wish/275626705 Explanation of the 5 types of correlation jdecapua https://padlet.com/jdecapua/moqv86g20axw/wish/275627700 Positive correlation: Positive correlation occurs when an increase in one variable increases the value in another.

Negative correlation: Negative correlation occurs when an increase in one variable decreases the value of another.

No correlation: No correlation occurs when there is no linear dependency between the variables.

Perfect correlation: 
Perfect correlation occurs when there is a funcional dependency between the variables.

Perfect correlation: In this case all the points are in a straight line.

Strong correlation: A correlation is stronger the closer the points are located to one another on the line.
]]> 2018-08-27 17:40:10 UTC https://padlet.com/jdecapua/moqv86g20axw/wish/275627700 Definition of Trend line jdecapua https://padlet.com/jdecapua/moqv86g20axw/wish/275630897 a line indicating the general course or tendency of something, a trend line has an R^2 value and a line of best fit is just the lines best placement to represent the points. ]]> 2018-08-27 17:46:09 UTC https://padlet.com/jdecapua/moqv86g20axw/wish/275630897 Explanation of correlation coefficient jdecapua https://padlet.com/jdecapua/moqv86g20axw/wish/275631440 The correlation coefficient is a number between -1 and +1 that shows how dependent the points on a graph are to the line. ]]> 2018-08-27 17:47:35 UTC https://padlet.com/jdecapua/moqv86g20axw/wish/275631440 Which problem is more reasonable? jdecapua https://padlet.com/jdecapua/moqv86g20axw/wish/275837006 B is more reasonable because, you can divide the numbers and get a number greater than 1. In A, you get a number less than 1. ]]> 2018-08-28 12:34:54 UTC https://padlet.com/jdecapua/moqv86g20axw/wish/275837006 Using the same data, create a scatter plot of the data on your calculator and use the linear regression tool to find the line of best fit. Does the equation here match the equation in task #3? Why or why not? jdecapua https://padlet.com/jdecapua/moqv86g20axw/wish/275839987 No, the equations are not the same because, the calculator can determine a perfect trend line for the data and when we draw a graph we have to guess where the best points would be. My line was, y=10.9x+180 and their line was y=12.56x+166.1]]> 2018-08-28 12:43:46 UTC https://padlet.com/jdecapua/moqv86g20axw/wish/275839987 Using the line of best fit from your calculator, determine how much fat would be expected in a 330-calorie hamburger. Explain how you got your answer. jdecapua https://padlet.com/jdecapua/moqv86g20axw/wish/275840737 In a 330 calorie burger, there would be an expected 13g of fat. I got my answer by setting up the equation, 330=12.56x+166.1 and solving to get 13.05g. ]]> 2018-08-28 12:46:35 UTC https://padlet.com/jdecapua/moqv86g20axw/wish/275840737 Does your answer in task #8 match your answer in task #4? Why or why not? jdecapua https://padlet.com/jdecapua/moqv86g20axw/wish/275841165 My answer for #4 was 13.76g and my answer for #5 was 13.05. The answers do not match because I had a different slope and y-intercept, although the answers were close they are not the same because I had different values for the different equations. ]]> 2018-08-28 12:47:48 UTC https://padlet.com/jdecapua/moqv86g20axw/wish/275841165 Problem for another student jdecapua https://padlet.com/jdecapua/moqv86g20axw/wish/275841970 in the table below there is data for how long students spend studying and their average grade on test. 
Time studying: 1hr, 1.5hrs, 2hrs, 2,5hrs, 3hrs, 5hrs
Average grades: C-, C, B-, B, A, A+.

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