You're working at a marketing firm. The firm recently introduced a new smartphone to the US market and they are interested if more than half of consumers in the US are familiar with the new product. The marketing firm surveyed 500 customers shopping for phones. Of those customers, 265 had heard of the new phone. What is the Z score for this test

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

It would be 18 cm