Question

1. You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 69.6 62.9 74.9 63.1 80.5 82.1 78 Find the 90% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place).

2. The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 72.1 for a sample of size 695 and standard deviation 11.7.

Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 95% 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).

Answer 1

1. You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 69.6 62.9 74.9 63.1 80.5 82.1 78 Find the 90% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place).