One method for measuring air pollution is to measure the concentration of nitrogen dioxide, or NO,, in the air. Suppose Nina, an environmental scientist, wishes to estimate the NO, concentration in Budapest, Hungary. She randomly selects 4 locations throughout the city measures the NO, concentration at each location. Based on her 45 samples, she computes th margin of error for a 95% t-confidence interval for the mean concentration of NO, in Budapest, in ug/m³, to be 4.28. What would happen to the margin of error if

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One method for measuring air pollution is to measure the concentration of nitrogen dioxide, or NO,, in the air. Suppose
Nina, an environmental scientist, wishes to estimate the NO, concentration in Budapest, Hungary. She randomly selects 45
locations throughout the city measures the NO, concentration at each location. Based on her 45 samples, she computes the
margin of error for a 95% t-confidence interval for the mean concentration of NO, in Budapest, in µg/m³, to be 4.28.
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?
Answer Bank
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Decrease
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Transcribed Image Text:One method for measuring air pollution is to measure the concentration of nitrogen dioxide, or NO,, in the air. Suppose Nina, an environmental scientist, wishes to estimate the NO, concentration in Budapest, Hungary. She randomly selects 45 locations throughout the city measures the NO, concentration at each location. Based on her 45 samples, she computes the margin of error for a 95% t-confidence interval for the mean concentration of NO, in Budapest, in µg/m³, to be 4.28. 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? Answer Bank Increase Decrease Stay the same
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