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Asample of size 20 from a normal distribution has sample mean 3.5 and sample variance 14.75. find 90% confidence intervals for the variance and standard deviation of the distribution.
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Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?
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Asample of size 20 from a normal distribution has sample mean 3.5 and sample variance 14.75. find 90...
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