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Devaughn is 5 years younger than sydney. the sum of their ages is45. what is sydney's age?
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Allie answered 72% of the questions on her math test correctly. if she answered 18 questions correctly, how many questions were on the test?
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Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?
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1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed
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Devaughn is 5 years younger than sydney. the sum of their ages is45. what is sydney's age?...
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