Each member of a random sample of 20 business economists was asked to predict the rate of ination for the coming year. Assume that the predictions for the whole population of business economists follow a normal distribution with standard deviation 2%. Find any pair of values such that the probability that the sample standard deviation lies between these values is 0.90.

Arepresentative from plan 1 wants to use the graph below to sell health plans for his company. how might the graph be redrawn to emphasize the difference between the cost per doctor visit for each of the three plans? the scale on the y-axis could be changed to 0–100. the scale on the y-axis could be changed to 25–40. the interval of the y-axis could be changed to count by 5s. the interval of the y-axis could be changed to count by 20s.