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1. A manufacturing plant produces a food product with a mean shelf life of 84 days and a standard deviation of 11 days. For a sample of 60 items, answer the following questions
a) What is the likelihood that the sample mean is at least 88 days?
b) What is the likelihood that the sample mean is between 86 and 88?
c) 80% of all sample means will be ABOVE what number of days?
2. A recent employee satisfaction survey taken within a multinational company found that 78% of all employees were satisfied with the working conditions. A sample of 250 employees is taken, what is the probability that
a) 85% or more of the sampled employees are satisfied?
b) 65% or less of the employees are satisfied.
c) Construct a 95% confidence interval of the true population proportion of employees who are satisfied if in a sample of 250 employees 190 said that they were satisfied.
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Estimate the population mean
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
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