In a particular municipality, it is believed that 25 percent ofhomes are not properly insulated. In order totest H0:p=.25 vs. HA:p?.25 (where p isthe population proportion of homes that are not properly insulated)a random sample of 300 homes was selected. In the sample, it wasfound that 96 homes were not properly insulated

If the null hypothesis is true, then the z-score for the sampleproportion is