Hurricanes Katrina and Rita caused the flooding of large parts of New Orleans, leaving behind large amounts of new sediment. Before the hurricanes, the soils in New Orleans were known to have high concentrations of lead, which is a dangerous environmental toxin. Zahran et al. (2010) measured the lead concentration of blood (in µg/dl) of children living in the 46 areas both before and after the hurricanes. The ratio of blood lead concentration after the hurricanes to that before the hurricanes for these areas are provided. This ratio has an approximately normal distribution. A ratio of 1.0 indicates no change. 0.67, 0.57, 0.88, 0.95, 0.60, 0.98, 0.64, 0.48, 0.26, 0.77, 0.87, 0.34, 0.56, 0.88, 0.77, 0.67, 0.59, 0.56, 0.54, 0.64, 0.90, 0.00, 0.53, 0.63, 0.57, 0.70, 0.41, 0.42, 0.69, 0.45, 0.67, 0.50, 0.60, 1.16, 0.33, 0.63, 0.63, 1.00, 1.05, 0.67, 1.00, 1.00, 0.75, 1.00, 1.00, 0.63 The sample size n as well as the sum of the ratio values and the sum of the ratio values squared are also provided, with Y; representing the ith ratio. n = 46, Σ Υ = 31.14, Σ (Y?) = 23.5806
Hurricanes Katrina and Rita caused the flooding of large parts of New Orleans, leaving behind large amounts of new sediment. Before the hurricanes, the soils in New Orleans were known to have high concentrations of lead, which is a dangerous environmental toxin. Zahran et al. (2010) measured the lead concentration of blood (in µg/dl) of children living in the 46 areas both before and after the hurricanes. The ratio of blood lead concentration after the hurricanes to that before the hurricanes for these areas are provided. This ratio has an approximately normal distribution. A ratio of 1.0 indicates no change. 0.67, 0.57, 0.88, 0.95, 0.60, 0.98, 0.64, 0.48, 0.26, 0.77, 0.87, 0.34, 0.56, 0.88, 0.77, 0.67, 0.59, 0.56, 0.54, 0.64, 0.90, 0.00, 0.53, 0.63, 0.57, 0.70, 0.41, 0.42, 0.69, 0.45, 0.67, 0.50, 0.60, 1.16, 0.33, 0.63, 0.63, 1.00, 1.05, 0.67, 1.00, 1.00, 0.75, 1.00, 1.00, 0.63 The sample size n as well as the sum of the ratio values and the sum of the ratio values squared are also provided, with Y; representing the ith ratio. n = 46, Σ Υ = 31.14, Σ (Y?) = 23.5806
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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please answer the question and give the t value.
Transcribed Image Text:Hurricanes Katrina and Rita caused the flooding of large parts of New Orleans, leaving behind large amounts of new sediment. Before the hurricanes, the soils in New Orleans were known to have high concentrations of lead, which is a dangerous environmental toxin. Zahran et al. (2010) measured the lead concentration of blood (in µg/dl) of children living in the 46 areas both before and after the hurricanes. The ratio of blood lead concentration after the hurricanes to that before the hurricanes for these areas are provided. This ratio has an approximately normal distribution. A ratio of 1.0 indicates no change.
Ratios:
0.67, 0.57, 0.88, 0.95, 0.60, 0.98, 0.64, 0.48,
0.26, 0.77, 0.87, 0.34, 0.56, 0.88, 0.77, 0.67,
0.59, 0.56, 0.54, 0.64, 0.90, 0.00, 0.53, 0.63,
0.57, 0.70, 0.41, 0.42, 0.69, 0.45, 0.67, 0.50,
0.60, 1.16, 0.33, 0.63, 0.63, 1.00, 1.05, 0.67,
1.00, 1.00, 0.75, 1.00, 1.00, 0.63
The sample size \( n \) as well as the sum of the ratio values and the sum of the ratio values squared are also provided, with \( Y_i \) representing the \( i \)-th ratio.
\( n = 46 \), \( \sum Y_i = 31.14 \),
\( \sum (Y_i^2) = 23.5806 \)
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