Mathematics, 26.02.2021 01:00 azireyathurmond1
A study of the career paths of hotel general managers sent questionnaires to an SRS of 250 hotels belonging to major U. S. hotel chains. There were 149 responses. The average time these 149 general managers had spent with their current company was 13.26 years. (Take it as known that the standard deviation of time with the company for all general managers is 4 years.) (a) Find the margin of error for an 85% 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.)
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