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A population of data from a paper supply company is known to have a mean weight of 55 ounces per ream and a population standard deviation of 5 ounces. The population is known to be bell shaped and symmetrical. Which of the following statements is correct description given what we know from the empirical rule.
A. 68% of the reams will be within 50 and 70 ounces
B. 99.7% of the reams will be within 54 ounces and 56 ounces
C. 99.7% of the reams will be within 45 and 65 ounces
D. B and C
E. None of the above
10 people taste wine A and wine B, X= denote the number prefer A. Assume that all others prefer B. These people random sample..
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As part of his review for a chemistry test, a student randomly selects (without replacement) 40 out of 102 elements listed on the standard tables, and tries to guess their atomic numbers.
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A random variable is normally distributed with a mean of 25 and a standard deviation of 5. If an observation is randomly selected from the distribution:
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You have to determine that your cutoff value at level a = 0.05 is 1.645 when testing whether the mean of a population is significantly different from 1.5. If you calculate a test statistic of 1.8 what is the proper conclusion?
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Which of the following statements isn't a property of the normal probability distribution? Please explain briefly why
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