Question

Asked Feb 16, 2020

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In Exercises 5–16, use analysis of variance for the indicated test.

Lead and Full IQ Scores Example 1 used measured performance IQ scores for three different blood lead levels. If we use the same three categories of blood lead levels with the full IQ scores, we get the accompanying Excel display. (The data are listed in Data Set 7 “IQ and Lead” in Appendix B.) Using a 0.05 significance level, test the claim that the three categories of blood lead level have the same mean full IQ score. Does it appear that exposure to lead has an effect on full IQ scores?

Excel

Step 1

The provided excel output is:

Step 2

Here, it is required to check the claim that the three categories of blood lead level have the same mean full IQ score.

The null and alternative hypotheses are:

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