Problem:
Brekky is a company that manufactures and sells boxes of breakfast cereal. Brekky has hired a new marketing manager. As she is new, she wants to get feedback on the company's breakfast cereals. The marketing manager decides to ask consumers to log into the Brekky website and do a short survey, in return for a ticket in a $100 lottery. Explain to the marketing manager ONE type of bias that will exist with her survey. b) The marketing manager is also reviewing past weekly sales ($000) and has used Excel to create the following data summaries, based on a random sample of data: The marketing manager is unsure how to interpret this data. Explain to the marketing manager if the distribution is symmetrical, positively skewed or negatively skewed and advise the value of the best measure of spread. c) Furthermore, the marketing manager has estimated the following probabilities: P(High sugar cereal) = 0.6, P(High protein cereal) = 0.4, P(High sugar and high protein) = 0.5 Write a short sentence explaining if you believe the joint probability is correct or wrong.