Coupon Accepted Successfully!


Test statistic


  • The value of the test statistic is simply the z-value corresponding to = $20,000





  • In this case, since the observed sample statistic (20,000) is greater than the critical value (19,658), so the null hypothesis is rejected =>
  • There is a significant difference in the hypothesized population parameter and the observed sample statistic =>
  • Mean income > 19,000 =>
  • Launch the course


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