2) If 20 workers can build a house in 45 days, how many more workers are needed
2 answers:
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Answer: Given a sample of 200, we are 90% confident that the true proportion of people who watched educational TV is between 72.1% and 81.9%.
Step-by-step explanation:
=0.049
0.77±0.049< 0.819, 0.721
Recall that
where is the angle between the vectors
whose magnitudes are
, respectively.
We have