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What does the term coefficient of variation mean?
The Coefficient of Variation is a ratio showing the degree to which individual points of data in a sample deviate from the mean. It is calculated by taking the standard deviation of the sample and dividing that by the mean of the sample. It can be useful for comparing different data sets because it is a ratio (or percentage) and not an absolute number.
What is a grouped frequency distribution used for?
To simplify analyses for large data sets. To simplify analyses for large data sets. To simplify analyses for large data sets. To simplify analyses for large data sets.
What is data sets?
They are groups of data.
What are box-n-whisker plots used for?
A basic summary of data or a simple comparison of a few sets of data.A basic summary of data or a simple comparison of a few sets of data.A basic summary of data or a simple comparison of a few sets of data.A basic summary of data or a simple comparison of a few sets of data.
What is the minimum required sample size for running logistic regression?
In fitting a logistic regression, as in applying any statistic method, the required sample size depends on the level of dispersion in the population and the quality of the statistics that you are prepared to accept. Usually there will be some information available somewhere (in the literature, say, or from colleagues) suggesting what level of variability to expect in data that is collected. This can be used to simulate some data sets and the logistic regression results that would arise from them. By varying the sizes of the data sets you can make a judgement. Once you have collected your first sample and fit the actual logistic regression to it you will have a much better idea how much data is actually required for useful estimates.
What is simple frequency distribution?
Simple frequency distribution is a method of organizing large data sets into more easily interpreted sets. An example is organizing sample test scores by the individual scores.
How do you find data sets for topics?
Hey! You can find data sets for a variety of topics at infochimps.com. Enjoy!
What does the term coefficient of variation mean?
The Coefficient of Variation is a ratio showing the degree to which individual points of data in a sample deviate from the mean. It is calculated by taking the standard deviation of the sample and dividing that by the mean of the sample. It can be useful for comparing different data sets because it is a ratio (or percentage) and not an absolute number.
What is a grouped frequency distribution used for?
To simplify analyses for large data sets. To simplify analyses for large data sets. To simplify analyses for large data sets. To simplify analyses for large data sets.
What is data sets?
They are groups of data.
Which of the statements are true about limited data sets?
There were no statements included. Asking multiple choice test questions usually doesn't work so well.
What is the null hypothesis tested by an ANOVA?
ANOVA test null hypothesis is the means among two or more data sets are equal.
Will a set of data always have a mode?
No, because sometimes sets of data can have different numbers and other sets of data can have modes in them.
Does all data have a mean median or mode?
No, not all data sets have a mode but all data sets have a mean and median.
What are box-n-whisker plots used for?
A basic summary of data or a simple comparison of a few sets of data.A basic summary of data or a simple comparison of a few sets of data.A basic summary of data or a simple comparison of a few sets of data.A basic summary of data or a simple comparison of a few sets of data.
What is the primary disadvantage of using the range to compare the variability of data sets?
The range is very sensitive to outliers. Indeed if there are outliers then the range will be unrelated to any other elements of the sample.
When should relative frequencies be used when comparing two data sets?
When comparing large data sets.
