Mathematics, 11.05.2021 17:20 hasshh
A study of the career paths of hotel general managers sent questionnaires to an SRS of 280 hotels belonging to major U. S. hotel chains. There were 167 responses. The average time these 167 general managers had spent with their current company was 11.77 years. (Take it as known that the standard deviation of time with the company for all general managers is 4.5 years.) (a) Find the margin of error for a 90% confidence interval to estimate the mean time a general manager had spent with their current company: years (b) Find the margin of error for a 99% confidence interval to estimate the mean time a general manager had spent with their current company: years (c) In general, increasing the confidence level the margin of error (width) of the confidence interval. (Enter: ''DECREASES'', ''DOES NOT CHANGE'' or ''INCREASES'', without the quotes.)
Answers: 1
Mathematics, 21.06.2019 16:50
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Mathematics, 21.06.2019 17:30
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Mathematics, 21.06.2019 19:00
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Mathematics, 21.06.2019 19:20
1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?
Answers: 2
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