Read the scenario below and answer the question that follows.
1 answer:
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Answer:
68 readings.
Explanation:
We need to take this problem as a statistic problem where the normal distribution table help us.
We can start considerating that X is the temperature of the solution, then
For a confidence level of 90% our is 1.645
Therefore,
Substituting for and re-arrange for n, we have that n is equal to
We need to make 68 readings for have a probability of 90% and our average is within