Aresearchers studying public opinion proposed social security changes obtains a simple random sample of 30 adult americans and asked them whether or not they support the proposed changes. to say that the distribution of the sample proportion of adults who respond yes, is approximately normal, how many more americans does the researcher need to sample in the following cases? (a) 20% of all adult americans support the changes(b) 25% of all adults americans support the changes

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

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8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75

96 cm is the answer.