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Mathematics, 15.01.2020 23:31 tylorroundy
One method for measuring air pollution is to measure the concentration of particulate matter having a diameter less than 10 microns, or pm10, in the air. suppose nina, an environmental scientist, wishes to estimate the pm10 concentration in brussels, belgium. she randomly selects 45 locations throughout the city measures the pm10 concentration at each location based on her 45 samples, she computes the margin of error for a 95% ț-confidence interval for the mean concentration of pm10 in brussels, in ug/m3, to be 3.17. what would happen to the margin of error if nina decreases the confidence level to 90%? nina increases the confidence level to 99%? nina decreases the sample size to 33 locations? nina increases the sample size to 65 locations?
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