Mathematics, 15.01.2020 01:31 gabe7774
Erica wants to know how many books on average are in school libraries in her county. she randomly calls 50 school libraries in her county and finds out how many books they have. she adds the number of books together and divides by 50. her conclusion is there are an average of 18,000 books in a school library. erica's conclusion is
a) invalid. her sample size is too small.
b) invalid. her sample size is too large.
c) valid. she used a representative sample.
d) bias. she wants schools to buy more new books.
Answers: 1
Mathematics, 21.06.2019 21:00, maddyleighanne
Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?
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Mathematics, 22.06.2019 01:00, franklinkaylieg3873
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