How much fluid drained and replaced with pure antifreeze
The radiator has 7 quarts of fluid, 35% of which is antifreeze. How much fluid must be drained and replaced with pure antifreeze so that new mixture is 55% antifreeze.
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A researcher is interested in studying people's mean age in certain region. If the population standard deviation is known to be eight years and 1.5 year of error margin is allowed, Determine the minimum simple size researcher needs to employ, know
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A computer manufacturer claims that chips it makes are so accurate that there is only 1/2000 probability of getting defective chip. A salesman at a local store bought 5 chips and claimed that 2 of them were defective. Determine the probability of
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Determine a 95% confidence interval for true mean annual income of nursing school alumni. Write down a statement about the confidence level and the interval you find.
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