Timothy wants to estimate the percentage of homeowners that own at least one dog. He surveys 100 randomly selected homeowners to determine whether or not they own dogs. What is the parameter? all homeowners the percentage of surveyed homeowners that own at least one dog the 100 homeowners surveyed the percentage of all homeowners that own at least one dog specific responses to the survey

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To identify the parameter in Timothy's survey, we need to understand what a parameter is in the context of statistics. A parameter is a numerical value that summarizes a characteristic of a population.

In this case, Timothy is interested in estimating the percentage of homeowners that own at least one dog. The population here consists of all homeowners, and the specific characteristic Timothy is interested in is the percentage of those homeowners who own at least one dog.

Now, let's analyze the options provided:

1. **All homeowners**: This refers to the entire population but does not specify a numerical value.
2. **The percentage of surveyed homeowners that own at least one dog**: This is a statistic derived from the sample (the 100 homeowners surveyed) and not the entire population.
3. **The 100 homeowners surveyed**: This is the sample itself, not a parameter.
4. **The percentage of all homeowners that own at least one dog**: This is the parameter Timothy is trying to estimate, as it refers to the entire population of homeowners.

Therefore, the correct answer is:

**The percentage of all homeowners that own at least one dog.**
The parameter is the percentage of all homeowners that own at least one dog.

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