A pizza delivery driver, always trying to increase tips, run…
A pizza delivery driver, always trying to increase tips, runs an experiment on his next 40 deliveries, all of which will be made on the same warm, sunny day. He flips a coin to decide whether or not to call a customer from his mobile phone when he is five minutes away, hoping this slight bump in customer service will lead to a slight bump in tips. After 40 deliveries, he will compare the average tip percentage between the customers he called and those he did not. Name some variables the driver controlled.
Read DetailsA manufacturer ships toasters in cartons of 10. In each cart…
A manufacturer ships toasters in cartons of 10. In each carton, they estimate a 10% chance that one of the toasters will need to be sent back for minor repairs. In a batch of 5,000 toasters, what are the chances that fewer than 450 toasters need to be returned? (round to three decimal places)
Read DetailsUsing the two-way frequency table, determine what is the pro…
Using the two-way frequency table, determine what is the probability that a person likes to watch football, given that she also likes to watch basketball? hint: use the total columns… likes to watch: Football not football Total basketball 22 14 not basketball 37 27 Total
Read DetailsReal estate ads suggest 74% of homes for sale have garages,…
Real estate ads suggest 74% of homes for sale have garages, 17% have swimming pools, and 3% have both features. What is the probability that a home for sale has a pool or a garage? (round to two decimal places) hint: venn diagram…
Read DetailsA manufacturer ships toasters in cartons of 10. In each cart…
A manufacturer ships toasters in cartons of 10. In each carton, they estimate a 10% chance that one of the toasters will need to be sent back for minor repairs. In a batch of 5000 toasters, the expected amount of toasters that is sent back is not always the same; the amount of toasters that get sent back vary in each batch of 5000 toasters. Determine how much the typical variance is in a batch of 5000 toasters.
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