In a survey, 23 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $39 and standard deviation of $4. Construct a confidence interval at a 99% confidence level. Give your answers to one decimal place.
Interpret your confidence interval in the context of this problem.

Late at night some traffic signals change patterns and become ?

An ancient marble statue is moved from a rural location to a highly polluted city explain how the move might affect the statue and why you think so

Panthers and leopards prey on deer in an ecosystem. for unknown reasons, the population of leopards increased drastically. what are the likely effects of this change on the species? 1. more food for panthers and more competition for leopards 2. less food and more competition for panthers 3. fewer deer and more competition for panthers 4. more food for deer and less competition for panthers and leopards 5. more food for leopards and less competition for panthers