Mathematics, 15.01.2021 05:10, Shybaby5019
The masses in grams of pennies minted in the United States after 1982 are normally distributed with the mean of 2.50g and a standard deviation of 0.02 g.
1. Find the probability that a randomly chosen penny has a mass less than 2.54 g.
2. Find the probability that a randomly chosen penny has a mass greater than 2.44 g.
3. For data described by a normal distribution, how do the mean and median compare?
4. What does the symmetry of the normal distribution tell you about the areas above and below the mean?
5. How can you tell if data follow a normal distribution by looking at a histogram of the data?
Essential Question How do you find percents of data and probabilities of events associated with normal
distributions?
Answers: 2
Mathematics, 21.06.2019 15:50, annadson4589
Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.
Answers: 2
Mathematics, 21.06.2019 19:40, marshallmattah
Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297
Answers: 1
The masses in grams of pennies minted in the United States after 1982 are normally distributed with...
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