In this section you'll find study materials for statistics help. Use the links below to find the area of statistics you're looking for help with. Each study guide comes complete with an explanation, example problems, and practice problems with solutions to help you learn statistics.

Study Guides

showing 81 - 90 of 216
  • 81.

    Basics of Probability Practice Test

    Review the following concepts if necessary: The Probability Fallacy Help

    Source: McGraw-Hill Professional
  • 82.

    Percentiles Help

    Percentiles in a Normal Distribution Percentiles divide a large data set into 100 intervals, each interval containing 1% of the elements in the set. There are 99 possible percentiles, not 100, because the percentiles represent the boundaries where the 100 ...

    Source: McGraw-Hill Professional
  • 83.

    Quartiles and Deciles Help

    Quartiles in a Normal Distribution There are other ways to divide data sets besides the percentile scheme. It is common to specify points or boundaries that divide data into quarters or into tenths. A quartile or quartile point is a ...

    Source: McGraw-Hill Professional
  • 84.

    Intervals by Element Quantity Help

    Introduction to Intervals by Element Quantitiy Percentiles, quartiles, and deciles can be confusing when statements are made such as, ''You are in the 99th percentile of this graduating class. That's the highest possible rank.'' Doubtless more than one student in ...

    Source: McGraw-Hill Professional
  • 85.

    Fixed Intervals Help

    Introduction to Fixed Intervals In descriptive measures statistics, you can divided up data sets into subsets containing equal (or as nearly equal as possible) number of elements, and then observed the ranges of values in each subset. There's another approach: we ...

    Source: McGraw-Hill Professional
  • 86.

    Descriptive Measures Other Specifications Help

    Other Specifications—Range There are additional descriptive measures that can be used to describe the characteristics of data. Let's look at the definitions of some of them. Range In a data set, or in any ...

    Source: McGraw-Hill Professional
  • 87.

    Descriptive Measures Practice Test

    Review the following concepts if necessary: Percentiles Help Quartiles ...

    Source: McGraw-Hill Professional
  • 88.

    Source Data and Sampling Frames Help

    Introduction to Sound Data and Sampling Frames In the real world, data is gathered by a process called sampling. It's important that the sampling process be carried out correctly, and that errors of all kinds be minimized (unless the intent is to ...

    Source: McGraw-Hill Professional
  • 89.

    Random Sampling Help

    Introduction to Random Sampling When we want to analyze something in a large population and get an unbiased cross-section of that population, random sampling can be used. In order to ensure that a sampling process is random (or as close as we can get), we ...

    Source: McGraw-Hill Professional
  • 90.

    Estimation Help

    Introduction to Estimation—Mean In the real world, characteristics such as the mean and standard deviation can only be approximated on the basis of experimentation. Such approximation is called estimation. Estimating the ...

    Source: McGraw-Hill Professional
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