A breakfast cereal company claims that their cereal increases children's ability to concentrate and to learn material because it has 2000 milligrams of vitamin C sprayed on it. A school psychologist believes this is unlikely and decides to test it. The psychologist selects a group of children who report eating the cereal for breakfast on a regular basis and compares their scores on the Revised Wechsler Intelligence Scale for Children (WISC-R). The population has mean score of 117 on the test with a standard deviation of 10.4. The data are recorded for each of the children in the sample and are reproduced below. Do the cereal-eating children have higher WISC-R scores? Use =.05

115 121 132 125 120 119 129 120 131

1. State your hypotheses in symbols (include both H_o and H₁).

2. Set up the criteria for making a decision. That is find the critical value. Use =.05.

3. Compute the appropriate statistical test.

4. Make decision about H_o: Reject H_o or Retain H_o (Fail to Reject H_o)

5. Write conclusion:

6. What type of error could you have made and why?