A graph of scores/classes/ranges (x-axis) against frequency density (y-axis).

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What is the equation for frequency density?

Frequency density = Frequency/Class width.

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Linear Interpolation is to...

...calculate estimates of Q_1, Q_2 and Q_3 from grouped data.

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When is a tree diagram binomial?

If there are n trials, if each trial has 2 outcomes with probabilities of p and q (p=1-q), if the outcomes are independent or if the probabilities remain constant.

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What is the formula to allow us to find probabilities without drawing trees?

B(n,p) ; P(X=r) = nCr*p^r*q^(n-r).

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What is the complement?

If there are less data that you don't want, find the probability of them and subtract from 1.

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Instead of calculating the probability, what can we use?

The Cumulative Binomial Tables.

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0!=?

0!=1

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8!/5!

=8x7x6/5x4x3. To cancel the 5! from the top, 5! is added on the bottom. To cancel 2! from 5!, 2! is added to the top. 8!2!/5!5!

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What can factorials be used for?

Arrangements/orders i.e. ABCDEFGHIJ=10 people. There are 10 possibilities for seats so arrangement=10!

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What is an arrangement with respect to an order?

Different orders count as different arrangements.

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What is a selection with respect to an order?

Different orders count as one selection.

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n=number of objects, r=number of arrangements.

In general, n objects use r arrangements: n!/(n-r)!

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Number of selections=?

selections=n!/r!(n-r)!=nCr

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Other cards in this set

Card 2

Front

What is a histogram?

Back

A graph of scores/classes/ranges (x-axis) against frequency density (y-axis).

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