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Theleeman Theleeman
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6 years ago
The average monthly electric bill of a random sample of 256 residents of a city is 90 with a standard deviation of 24.
 a. Construct a 90 confidence interval for the mean monthly electric bills of all residents.
  b. Construct a 95 confidence interval for the mean monthly electric bills of all residents.
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syaarsyaar
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6 years ago
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Theleeman Author
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6 years ago
Thank you, thank you, thank you!
Brownr40
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Yesterday
Brilliant ツ
Roselalo
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2 hours ago
This helped my grade so much Perfect
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