Mathematics, 15.04.2021 05:40 s5177
A researcher wishes to estimate within $300 the true average amount of money a country
spends on road repairs each year. If she wants to be 90% confident, how large a sample is
necessary? The standard deviation is known to be $900.
Answers: 3
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A researcher wishes to estimate within $300 the true average amount of money a country
spends on ro...
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