1 sample proportion test

Jail inmates can be classified into one of four crime categories. Suppose a random sample of 1000 female inmates and a random sample of 1000 male inmates were taken. Each inmate was classified into a crime category. The results are tabulated as shown. At α = 0.01..

Stated by French chemist Joseph Proust A chemical compound always contains same elements combined together in the same proportion by mass. For example, pure water obtained from different sources such as river, well, springs, sea, etc., always contains hydrogen and oxygen together in the ..

A researcher would like to estimate the proportion of all mothers who take black coffee during pregnancy. She would like to be 90% confident that the estimate is within 2.5 percentage points of the true proportion. What sample size is required? => 0.574 or 0.109 or ..

About 16% of persons in the U.S live in households with income below poverty line. What is the probability that the poverty rate in the sample of 1,000 is within the 1 percentage point of the true proportion? => 0.68 or 0.30 or 0.59 or 0.41..

In a school, 600 out of 1,000 students support team A. If a random sample of 100 students is selected, then what is the probability that the proportion of students who support team A lies between 0.5 and 0.7? => 48.38% or 96.76% or 99.76% or 3.24%..

This law was proposed by Louis Proust in 1799, which states that: 'A chemical compound always consists of the same elements combined together in the same ratio, irrespective of the method of preparation or the source from where it is taken'. For example, water is always found to contain only two e..

Alkali 1 part Water 7 parts Starch 1 pa..

Invertendo - If a:b=c:d then b:a = d:c a:b=c:d Dividing 1 by each of these ratio..

A researcher selected a sample of 120 milk chocolate bars of 1.6 ounce and found that 90 of them had 230 calories on an average. Find the 90% confidence interval for the true proportion of chocolates with 230 calories. => 67.5% < p < 82.5% or 71% < p < 79% ..

This law was proposed by Ritcher in 1792. It states that 'when two different elements combine separately with the same weight of a third element, the ratio of the masses in which they do so will be the same or some simple multiple of the mass ratio in which they combine with each other'. For examp..