Statistics - Exam 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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| value measuring some characteristic of a population | parameter
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| value measuring some characteristic of a sample | statistic
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| variance of a sample symbol | s²
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| standard deviation of a sample symbol | s
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| variance of a population symbol | σ²
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| standard deviation of a population symbol | σ
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| mean of a sample symbol | x with a line above it
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| mean of a population symbol | mu
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| process that leads to well defined results called outcomes | probability experiment
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| set of all possible outcomes | sample space
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| if two events can not occur simultaneously | mutually exclusive
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| if one event does not affect the probability of another event | statistically independent
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| The 3 approaches to probability are ____________. | classical, relative frequency, subjective
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| Use classical approach when __________. | sample space can be listed, randomness (no bias)
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| Use relative frequency approach when __________. | sample space cannot be listed, bias exists
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| probabilities based on expert opinions | subjective approach
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| The 4 conditions of binomial experiments are ____________. | fixed number of trials, trials are independent, probabilities remain the same per trial, 2 outcomes per trial (success & failure)
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| number of trials symbol | n
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| number of successes in n trials symbol | x (r on calculator)
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| probability of success per trial symbol | p
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| probability of failure per trial symbol | q
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| factorial symbol | !
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| complement of A symbol | A with a line over it
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| table that lists all possible values of a random variable (x) along with its corresponding probabilities | discrete probability distribution
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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.
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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:
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