To start a program to improve the quality of production in a factory, all the products coming off a production line, under what we have reason to believe are normal operating conditions, are examined...

To start a program to improve the quality of production in a factory, all the products coming off a production line, under what we have reason to believe are normal operating conditions, are examined and classified as “good” products or “defective” products. The number of defective products in each successive group of six is counted. The results for 60 groups, so for 360 products, are shown in Table 3.1. Find the mean, median, mode, first quartile, third quartile, eighth decile, ninth decile, proportion defective in the sample, first estimate of probability that an item will be defective, sample variance, sample standard deviation, and coefficient of variation.