Section 5-2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| random variable | a variable( tyically represented by x) that has a single numerical value, determined by chance, for each outcome of a procedure
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| Probability distribution | a sescription that gives the probability for each value of the random variable; often expressed in the format of a graph, table, or formula
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| Continuous random variable | infinitely many values, and those values can be associated with measurements on a continuous scale without gaps or interruptions
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| Discrete random variable | either a finite number of values or countable number of values, where "countable" refers to the fact that there might be infinitely many values, but they result from a counting process.
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| Unusually high | x successes among n trials is an unusually high number of successes if p(x or more) is less than or equal to 0.05
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| unusually low | x successes among n trials is usually low number of success if p(xor fewer) is less than or equal to 0.05
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| range rule of thumb | most values should lie within 2 standard deviations of the mean.
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| expected value | of a discrete random variable is denoted by E, and it represents the mean value of the outcomes.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
crickie11
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