下午1:20 4月20日周三 7 62% •.. ... 11. Ecologists wanted to estimate the mean biomass (amount of vegetation) of a certain forested region. The ecologists divided the region into plots measuring 1 square...

Extracted text: 下午1:20 4月20日周三 7 62% •.. ... 11. Ecologists wanted to estimate the mean biomass (amount of vegetation) of a certain forested region. The ecologists divided the region into plots measuring 1 square meter each, and they selected a random sample of 9 plots. The mean biomass of the 9 plots was 4.3 kilograms per square meter ( kg/m²) and the standard deviation was 1.5 kg/m. Assuming all conditions for inference are met, which of the following is a 95 percent confidence interval for the population mean biomass, in kg/m² ? V1.5 (A) 4.3 ± 1.96 3 (1.5 (B) 4.3 ±1.96| 3 V1.5 (C) 4.3 ± 2.306 9. (D) 4.3 ± 2.306 9. 1.5 (E) 4.3 土2.306 3