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An important step in creating confidence intervals for proportions is to check whether the success/failure conditions have...

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Basic Math

An important step increating confidence intervals for proportions is to check whetherthe success/failure conditions have been met otherwise the intervalcreated will not be valid (i.e. we should not have created thatinterval)!

The following examplesare estimating the proportion of the population who likes Brusselssprouts. Try to determine whether or not the assumptions have beenmet.

In a sample of 150people surveyed, 36 liked Brussels sprouts.

conditions met? or not

In a sample of 104people surveyed, 100 liked Brussels sprouts.

conditions met? or not

In a sample of 65people surveyed, 25 liked Brussels sprouts.

conditions met? or not

In a sample of 31people surveyed, 28 liked Brussels sprouts.

conditions met? or not

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