Urgent Stat Help: QNT 561

Urgent Stat Help: QNT 561

  1. A random sample of 91 observations produced a mean xbar  = 25.4 and a standard deviation s = 2.6,           a.  Find a 95% confidence interval   for u    b.  Find a 90% confidence intervalue for  u       c.  Find a 99% confidence interval for u

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