EC Question 10: Confidence Intervals Homework . Answered . Due Dec 2nd, 11:59 PM The average time spent by construction workers who work on the weekends is 7.9 hours. Assume the distribution of weekend work time is approximately normal with a standard deviation of 0.8 hours. Hypothetically, assume we are able to repeatedly sample groups of 50 construction workers and record the time each worker in the sample works on the weekends. For each of the repeated samples, assume a 90% confidence interval was constructed for the average weekend work time. Which of the following statements is FALSE about these intervals? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Approximately 10% of the intervals will not contain the true population mean. b All of the confidence intervals will be centered at 7.9. C The margin of error for each of the intervals will be the same. d Approximately 9 in every 10 intervals will contain the true population mean