<h2>
Answer with explanation:</h2>
Given : Significance level : 
Critical value : 
Margin of error : 
Standard deviation : 
The formula to find the sample size :-

Then, the sample size will be :-

The minimum final size sample required is 10.
If only 30 percent of households have a cat, then the proportion of households have a cat = 0.3
The formula to find the sample size :-

Then, the sample size will be :-

Hence, the initial number of households that need to be contacted =1