What mean value should water-treatment machine be adjusted

Reference no: EM132219631

Questions -

Q1. Daily wind speeds were recorded at an ocean-side resort for three months. February had a mean speed of 2.342 miles per hour (mph), a standard deviation of 1.557 mph and a maximum speed of 6.73 mph. June's mean wind speed was 0.857, its SD was 0.795 and maximum of 3.93 mph. The August mean was 0.63 mph with a SD of 0.597 mph, and a maximum speed of 2.53 mph.

a. Which month's maximum speed had the most extraordinary mph for the group?

b. What percent of the batches of water discharged exceed the 80 ppm legal limit?

Q2. The manufacturer's lawyers insist that no more than 2% of the water exceed the 75 ppm legal level.

What mean value should the water-treatment machine be adjusted to meet this goal? Assume the standard deviation does not change.

Reference no: EM132219631

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