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Computing binomial probabilities with Minitab

Computing binomial probabilities with Minitab

Computing binomial probabilities with Minitab

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So you are asking <strong>Minitab</strong> to enter all values from 0 to 15 in the column C1. You<br />

will see the values appear in column C1. Next you use the probability<br />

distributions command (as described above) to compute the <strong>probabilities</strong><br />

associated <strong>with</strong> the values in column C1, only that instead of using “input<br />

constant” box you use “Input Column” and select C1. For storage specify a<br />

different column, say C2. Press Ok. You will see the <strong>probabilities</strong> appear in<br />

column C2 in your worksheet.<br />

Unfortunately <strong>Minitab</strong> cannot draw the histogram of the data if it is given in two<br />

columns out of which one contains the <strong>probabilities</strong> associated <strong>with</strong> the values in<br />

the first column (or at least I haven’t found that out yet).<br />

Surprisingly enough this can be done <strong>with</strong> TI83.<br />

One way of getting the histogram of a <strong>binomial</strong> distribution is to generate<br />

random data following the given model and construct a histogram of the data<br />

generated.<br />

Here are the steps to do just that. We will generate 1000 values from a Binomial<br />

model <strong>with</strong> 15 trials and probability p=0.7 of success. That is, <strong>Minitab</strong> will<br />

generate 100 rows of data that will represent the number of successes out of 15<br />

trials.<br />

Choose CALC- Random Data – Binomial. Enter the number of rows to<br />

generate (1000 in our case), specify the number of trials and the probability of<br />

success as well as the column where you want the data to be stored (C3 on our<br />

screen). Press OK. See screen shots on next page.

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