Note: for this problem, your answer should be rounded to two decimal places. in a particular municipality, it is believed that 25 percent of homes are not properly insulated. in order to test h0: p=.25 vs. ha: p? .25 (where p is the population proportion of homes that are not properly insulated) a random sample of 300 homes was selected. in the sample, it was found that 102 homes were not properly insulated. if the null hypothesis is true, then the z-score for the sample proportion is:

3.6

Step-by-step explanation:

The test statistic for proportion is given by :-

, where p is the population proportion , is the sample proportion and n is the sample size.

Let p be the population proportion of homes are not properly insulated.

As per given , we have

p= 0.25

Sample size : n= 300

In the sample, it was found that 102 homes were not properly insulated.

Then ,

The test statistic for proportion is given by :-

Hence, the  z-score for the sample proportion is: 3.6

7

step-by-step explanation: