Some scatter plot ideas are:
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There is no specific good number since the reliability of a prediction depends on the spread of the scatter plot. If the plot is tightly packed along some line (straight or curved) then a small number of observations will suffice. If, on the other hand, the plot consists of points all over the place then even 100 points is not sufficient for making reliable predictions.
A straight line which best describes the data on a scatter plot is called a "line of best fit". The line could pass through some of the points, all of them, or none of them.
Scatter-plot shows correlation between two different variables (one on the y-axis, the other on x-axis). If there is linear correlation, the scatter-points form a straight line from zero (origo) to some direction. The more cloud-like distribution the scatter-plot does have, the less those variables in question have correlation or dependence with each other.
bar graph circle graph scatter plot box and whisker stem and leaf plot ven diagram. Line graph
Use a scatter plot graph to represent the correlation between two different variables. Here are some steps to make a basic scatter plot graph.Get your data into an Excel spreadsheet (type, copy, link, etc.).Highlight the data you want to display on the graph.Select the Insert tab from the ribbon bar.From the Charts section, click on Scatter and select the Scatter with only Markers option.Move, format, and adjust the chart to meet your needs.
A scatter plot. Most other graphs will summarise some of the data.
A scatter plot, a line chart, a bar chart are some possible answers.
Simply that there were some observations that were very much smaller or very much larger than most of the rest.
Correlation is an estimate of a linear relationship between two variables and takes no account of non-linear relationship. If the relationship is quadratic and the domain is symmetric about some point, the correlation will be zero. It is, thus possible for the points on the scatter plot to lie exactly on a parabola while the calculated correlation is zero. In such a case, it is easy to make a prediction despite no correlation.
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The line of best fit is simply the line that shows the general direction of the graph. The trick is to make the line go through as many points on the graph as possible. Some scatter plots have no line of best fit.