Q.3 A sample of 400 families in an old city is selected ran randomly, and a sample of 500 families is randomly selected from several new colonies of the same city. A survey is conducted for the number of houses possessing television sets. The number TV holder in the old city is 48 out of 400 of -selected families and 120 in new colonies out families. Then the hypothesis of 500 hypothesis whether the proportion of TV holders in old city and in the new colonies is the same.