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For a study of unhealthy eating behaviors, the researcher surveyed 266 high school students who were 18 years old.In this sample, 58.3% reported that they had dieted sometime in the past year. Give a 95% confidence for the true proportion 18 year-old high school students in this population who were on a diet sometime in the past year.
A statistics professor plans his classes so carefully that the lenghts of his classes are uniformly distributed 50.0 and 52.0 minutes. Find the probably that a given class period runs greater than 51.5 minutes.
Suppose that V and W are vector subspaces of Rn. If I define: How can I prove that V+W is also a vector subspace of Rn and ALSO how could verify that (for example)
Indicate whether each system is independent, inconsistent or dependent
A rectangular box has length 7 inches, width 17 inches, and a height of 20 inches. Find the angle between the diagonal of of the box and the diagonal of its base. The angle should be measured in radians.
Problem solving on single mean
an open rectangular box with square ends to hold 6400 cu. cm. is to be built at a cost 75 cents/sq.cm. for the base and 23 cents/sq.cm. for the side. find the most economical dimension.
A large box-shaped arena has a rectangular floor that measures 200 feet by 150 feet, and a flat ceiling that is 35 feet above the floor. Find the area of the floor and the volume of the arena.
The company has 340 hours of labor available each week and can afford to buy $2250 worth of materials. How many recliners and how many sofas can be produced if all labor hours and all materials are used?
you have the following data on 1 the average annual returns of the market for the past 5 years and 2 similar
A closed box with a square base has to have a volume of 19,000 cubic inches. Find a function for the surface area of the box.
you are going to roll four twenty-sided dice. if the rolls total to 20 or less roll two more twenty-sided dice and add
Evaluation of probability of randomly selected customer- Normal Distribution
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