1. A manufacturing company is concerned about the number of defective items produced by their assembly line. In the past they have had 5% of their products produced defectively. They take a random sample of 35 products. What is the probability that more than 5 products in the sample are defective?

• 0.0041
• 0.0059
• 0.1428
• 0.9941

2. Under which of the following circumstances is it impossible to construct a confidence interval for the population mean?

• A non-normal population with a large sample and a known population variance
• A normal population with a large sample and a known population variance
• A non-normal population with a small sample and an unknown population variance
• A normal population with a small sample and a known population variance