The manufacturer of Suzanne Space Saver tables finds that the mean time needed by online buyers to assemble the tables is 1 hour with a standard deviation of 0.25 hours. The design team of the firm has developed a new manual to reduce the time needed to assemble the table by its buyers. To test the effectiveness of the new manual, the team selects and gives 20 buyers the new manual to use. The sampled buyers take a mean of 0.45 hours to assemble each table. Assuming that the population is normally distributed, and using the 0.05 level of significance, should we conclude that the new manual is effective?  State H0 and HA. Select alpha (α). Select the test statistic and compute it. Get the critical value from your tables.  Compare your test statistic and your critical values from steps 3 and 4 above. Give your conclusion by answering whether at 0.05 level of significance, we should conclude that the new manual is effective. Clearly state your reason.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The manufacturer of Suzanne Space Saver tables finds that the mean time needed by online buyers to assemble the tables is 1 hour with a standard deviation of 0.25 hours. The design team of the firm has developed a new manual to reduce the time needed to assemble the table by its buyers. To test the effectiveness of the new manual, the team selects and gives 20 buyers the new manual to use. The sampled buyers take a mean of 0.45 hours to assemble each table.

Assuming that the population is normally distributed, and using the 0.05 level of significance, should we conclude that the new manual is effective? 

  1. State Hand HA.
  2. Select alpha (α).
  3. Select the test statistic and compute it.
  4. Get the critical value from your tables. 
  5. Compare your test statistic and your critical values from steps 3 and 4 above.
  6. Give your conclusion by answering whether at 0.05 level of significance, we should conclude that the new manual is effective. Clearly state your reason.
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