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Skoochy Skoochy
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7 years ago
A random sample of 31 sales charge showed a sample standard deviation of 50 . A 90 confidence interval estimate of the population standard deviation is
 a. 1715.101 to 4055.589.
  b. 1596.458 to 4466.679.
  c. 39.956 to 66.833.
  d. 41.393 to 63.684.
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vbassvbass
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7 years ago
Brilliant ツ
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