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The distribution of the amount spent for childcare in a Midwestern city has a mean of...

The distribution of the amount spent for childcare in a Midwestern city has a mean of $675 and a standard deviation of $80. A random sample of 64 families paying for childcare is selected.

  1. Is the sampling distribution of the sample mean approximately normal?

  2. What is the mean?

  3. What is the standard deviation?

  4. Find the probability that the sample mean is between $645 and $700.

  5. Find the probability that the sample mean is less than $700.

Math   Statistics-And-Probability   
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