a) The shelf life of a battery produced by a major company is normally distributed with a mean of 8 years and a standard deviation of 0.2 years. What value of shelf life do 19.49% of battery shelf lives fall below?Do not round your final answer b) The shelf life of a battery produced by a major company is normally distributed with a mean of 8 years and a standard deviation of 0.2 years. What value of shelf life do 14.46% of battery shelf lives fall above?Do not round your final answer. c) The number of pizzas that a delivery driver delivers during a shift has a normal distribution with mean of 13 and standard deviation 5. What is the probability that in a random sample of 9 shifts, the driver delivers more than 11 pizzas? Round all z scores to two decimals. Enter your final answer as a decimal to four places (e.g. 0.1234). Probabilities must match values from the table

Suppose that the quarterly sales levels among health care information systems companies are approximately normally distributed with a mean of 12 million dollars and a standard deviation of 1.3 million dollars. One health care information systems company considers a quarter a "failure" if its sales level that quarter is in the bottom 20% of all quarterly sales levels. Determine the sales level (in millions of dollars) that is the cutoff between quarters that are considered "failures" by that company and quarters that are not. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place. million dollars X S

Assume that the mean amount of coffee dispensed is 6 ounces and a standard deviation is 0.5 ounce use the empirical rule. What percent of cups should have at least 6 ounces and what percent of cups should have less then 4.5 ounces of coffee?

The shelf life of a battery produced by one major company is known to be Normally distributed, with a mean life of 3.5 years and a standard deviation of 0.75 years. What is the upper quartile of battery shelf life? Use the fact that the middle 50% of the data falls within 0.67 standard deviations from the mean.