The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 75.7 for a sample of size 640 and standard deviation 17.9. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 98% confidence level). Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). CMCJ Answer should be obtained without any preliminary rounding. Question Help: El Video Submit Question Assume that a sample is used to estimate a population mean u. Find the margin of error M.E. that corresponds to a sample of size 7 with a mean of 20.7 and a standard deviation of 18.1 at a confidence level of 95%. Report ME accurate to one decimal place because the sample statistics are presented with this accuracy. Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Question Help: El Video Submit Question You measure 20 dogs' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 3.1 ounces. Based on this, construct a 99% confidence interval for the true population mean dog weight. Give your answers as decimals, to two places Question Help: El Video Submit