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

To start a program to improve the quality of production in a factory, all the items coming off a production line, under what we have reason to believe are normal operating conditions, are examined and classified as “good” items or “defective” items. The number of defective items in each successive group of six is counted. The results for 60 groups, 360 items, are shown in Table 3.4. 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.

But now we will use Excel.