Cash to find work? (4.2) Will cash bonuses speed the return to work of unemployed people? The Illinois Department of Employment Security designed an experiment to find out. The subjects were 10,065 people aged 20 to 54 who were filing claims for unemployment insurance. Some were offered $500 if they found a job within 11 weeks and held it for at least 4 months. Others could tell potential employers that the state would pay the employer $500 for hiring them. A control group got neither kind of bonus.17 (a) Describe a completely randomized design for this experiment. (b) How will you label the subjects for random assignment? Use Table D at line 127 to choose the first 3 subjects for the first treatment. (c) Explain the purpose of a control group in this setting.

Confidence Interval Sample statistic Usually a point estimate Used to estimate population parameter Sample point estimate +/- margin of error Lower endpoint sample point estimate upper endpoint Margin of error Margin of error Measure of variability associated with point of estimate at desired level of confidence Small margin of error means higher precision Higher desired confidence level means a larger margin of error Lowest value in the computed confidence level =lower endpoint Highest value in the computed confidence level= higher endpoint Confidence interval for p Point estimate +/- margin of error Margin of