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A bookstore at a large college claims that the mean amount of money each student spends on books each semester is $252.92 with a standard deviation of $58.21. On the study trip an SRS of 40 current students says they have spent an average of $265.16 on books. What is the probability that a sample of this size will have an average amount spent that is between $260 and $270?

We cannot say because the condition for randomness, independence, or normality is not met.

  • 0.032
  • 0.189
  • 0.138
  • 0.067
  • 0.413

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