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What are some sources of data?
some sources of data are information
What are two sources of data?
Simple, Primary and Secondary Data
Is A negative z score is unusual?
In general, the answer is no, both negative and positive z score values should be expected. A z-score (or standardize score) is the raw data value minus the mean and then this result divided by the standard deviation. If the data can be considered normally distributed and a random sample is taken from a population, then as the sample size becomes large, approximately half the z-scores should be negative and half of the z-scores should be positive. There are some exceptions. Small data sets may have only positive values. A non-normal (skewed) distribution if skewed to the right, may have, after normalizing, may have a higher portion of z scores as positives.
Which agency collects data that is used by researchers to compare crime in different countries?
The FBI collects data used by researches to compare crime in different countries.
Can zero be the median of any data?
Certainly, if some of the data is negative
