The mayor of a large town wants to estimate the proportion of households in the town that would support a proposal. The mayor’s assistant randomly selects 100 households and asks whether they would support the mayor’s proposal. Sixty households responded that they would. What is the appropriate inference procedure?

The question asks for an estimate of the proportion of households that support the proposal. The assistant took one random sample of 100 households, and 60 supported it, so this is a one-sample proportion problem. The appropriate procedure is a one-sample z-interval for p; t-intervals are used for means, and a two-sample interval compares two groups.

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