Asurvey claims that 9 out of 10 doctors (i. e., 90% recommend brand z for their patients who have children. to test this claim against the alternative that the actual propo rtion of doctors who recommend brand z is less than 90%, a random sample of 100 doctors results in 93 who indicate that they recommend brand z. the test statistic in this problem is approximately (round to the nearest hundredth:

OK 100% of doctors in the mid-1800s found to be correct and all surgeries

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.