Blood pressure readings are normally distributed
Suppose that blood pressure readings are normally distributed with the mean of 116 and standard deviation of 9.6. If 144 people are randomly chosen, determine the probability that their mean blood pressure will be less than 118.
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At 0.05 level of significance, is there evidence of difference in the mean measurements in-line and from an analytical lab? What assumption is necessary about the population distribution in order to perform this test?
If the pre-1982 pennies weigh on average 3.09 g and thepost-1982 pennies weigh 2.51 g, a student weighs the 1131 pennies and finds them to have a mass of 3001.8 g. Determine the numbers of the pennies are post-1982?
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Determine the numbers of grams of oxygen are needed to burn 100 g of propane? What volume of oxygen would be required to burn 100 g of propane at standard temperature and pressure (25 C and 1 atm).
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