Mathematics, 02.06.2021 18:10 jesusdelao

An environmentalist would like to estimate the true mean weight of all cars. To do so, she selects a random sample of 30 cars and determines that the 90% confidence interval for the true mean weight to be 2.8 to 3.4 tons. Which of the
following would increase the margin of error for this confidence interval?
O selecting another sample
increasing the sample size
O increasing the confidence level
O decreasing the confidence level

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