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Do you form a hypothesis before collecting data?
Yes. The data must not be allowed to influence the choice of the hypothesis.
How do you write in a suitable degree of accuracy 1.079871565?
First you must decide what is a "suitable degree of accuracy" for a particular problem. In many cases, 4 or 5 significant digits are appropriate, or even 3. But it depends a lot on the original data (the final result is not supposed to look more accurate than the accuracy you can justify from the original data), and the purpose of the data (in some cases you need a higher accuracy than in others).
Can there be more than one expression that describes a set of data in a table?
no * * * * * Yes, almost always. If you have n data points which are 1-to-1, then it is always possible to fit a polynomial of degree n-1 or greater.
What are some advantages of displaying data as a graph?
1. Discovery or identify trends, particularly in time related data 2. Compare sets of data and identify relationships 3. Identifying points that may be erroneous because they are outside of the normal grouping of data. 4. Examine degree of consistency or scattering of data 5. Graphs can effectively communicate ideas/ relationships to others. People can see relationships easier than just looking at numbers.
Interval and ratio data examples?
Interval Data: Temperature, Dates (data that has has an arbitrary zero) Ratio Data: Height, Weight, Age, Length (data that has an absolute zero) Nominal Data: Male, Female, Race, Political Party (categorical data that cannot be ranked) Ordinal Data: Degree of Satisfaction at Restaurant (data that can be ranked)
