1.A ______________________ provides additional information aboutvariability. a.Point estimate b.Confidence estimate c.Confidenceinterval d.Point interval
2. ________________________ is the amount added and subtractedto the point estimate to form the confidence interval. a.Standarderror b.Sampling error c.Sampling mean d.Margin of error
3. A sample of 36 sheets of metal from a large normal populationhas a mean thickness of 30 mm. We know from previous qualitycontrol testing that the population standard deviation is 3.3 mm.Develop a 95% confidence interval for the true mean for thepopulation.
4. A random sample of 16 people has a mean age = 40 years oldand a sample standard deviation of 5 years. Form an 80% confidenceinterval for the mean.
