A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 1616 subjects had a mean wake time of 102.0102.0 min. After treatment, the 1616 subjects had a mean wake time of 97.997.9 min and a standard deviation of 23.723.7 min. Assume that the 1616 sample values appear to be from a normally distributed population and construct a 9090% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 102.0102.0 min before the treatment? Does the drug appear to be effective? Construct the 9090% confidence interval estimate of the mean wake time for a population with the treatment.

The table shows the relationship between the number of cups of cereal and the number of cups of raisins in a cereal bar recipe: number of cups of cereal number of cups of raisins 8 2 12 3 16 4 molly plotted an equivalent ratio as shown on the grid below: a graph is shown. the title of the graph is cereal bars. the horizontal axis label is cereal in cups. the x-axis values are 0, 20, 40, 60, 80,100. the vertical axis label is raisins in cups. the y-axis values are 0, 10, 20, 30, 40, 50. a point is plotted on the ordered pair 40,20. which of these explains why the point molly plotted is incorrect? (a) if the number of cups of cereal is 40, then the number of cups of raisins will be10. (b)if the number of cups of raisins is 40, then the number of cups of cereal will be10. (c) if the number of cups of cereal is 40, then the number of cups of raisins will be 80. (d) if the number of cups of raisins is 40, then the number of cups of cereal will be 80.

What is the ratio fraction form of 25: 9

Find the average rate of change for the given function drom x=1 to x=2