An experiment was conducted at a small supermarket for a period of 88 days on the sales of a single brand of dog food, involving three levels of shelf height: knee level, waist level, and eye level. during each day, the shelf height of the dog food was randomly changed on three different occasions. sales, in hundreds of dollars, of the dog food per day for the three shelf heights are given below. based on the data, is there a significant difference in the average daily sales of this dog food based on shelf height? use a 0.050.05 level of significance.

Christine wong has asked dave and mike to her move into a new apartment on sunday morning. she has asked them both, in case one of them does not show up. from past experience, christine knows that there is a 40% chance that dave will not show up and a 30% chance that mik a. what is the probability that both dave and mike will show up? (round your answer to 2 decimal places.) b. what is the probability that at least one of them will show up? c. what is the probability that neither dave nor mike will show up? (round your answer to 2 decimal places.)e will not show up. dave and mike do not know each other and their decisions can be assumed to be independent.