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Q: How many data points should a trend line have above and below it?
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When a trend line is drawn on a scatter-plot there are 4 points above the trend line about how many points should be below the trend line?

The amount an individual point departs from the trend line is the important feature, not that the number above and below should be balanced. A point that is much further away from the trend line is less likely to represent the process being plotted. Each point is of course quite real, but each are influenced by measurement error, random processes within the experiment, recording (transcription) error, and so on. If most of your points lie on a smooth curve, it is more likely that an outlier is subject to error.


Why isnt it necessary for all of the data points to be on the drawn line of the graph?

The line of a graph is quite often used to indicate the average of various data points that fall both above and below the line. Very jagged lines get smoothed out, but the trend is the same.


What do you notice about the boiling points as you move from left to right across the periodic table?

The trend of boiling points across a period in the periodic table should decrease from metals to nonmetals. The trend becomes more complicated between metals, the boiling point of metals tends to increase across a period.


What do you mean by mean vector in statistics?

The direction in which the trend analysis points.


What is a trend on a scatter graph?

Its when the datas points are going upwards or downwards


What is a trend on a graph?

It is the description of a slope of a line which connects from many points you mark to show a way that your graph data may increase or decrease. If it is decreasing, you have a downwards trend. If it is increasing, you have an upwards trend.


How can you predict the placement of an unknown element on a periodic table based on physical an chemical properties?

You look at trends. An element is likely to have properties somewhere between the element above it and the element below it; if there's nothing below it (or above it), then you can follow the general trend up (or down) that column and extrapolate.


What is the trend in melting points as you go down the group of halogens?

The melting point is greater.


What word best descibes the trend on a line connecting the points falls from left to right?

decreasing


Why caesium is liquid at nearly room temperature?

Why not? Or, in other words, there's not really a "why" to explain here; it's an extension of a well-established trend (unlike mercury, which is a liquid at room temperature while all the metals around it are solid and there's no such trend that would predict its dramatically lower melting point). The trend for alkali metals is that they have lower melting points as you move down the table. By the time you get to caesium, it's only a little above room temperature, and the theoretical melting point for francium is even lower than that (but still slightly above room temperature).


How do you use the word inconsistent in a sentence?

The data points were inconsistent and therefore no specific trend could be noted.


What is a line between two points on a graph to reflect the general pattern of data called?

Its called a trend.