A developmental psychologist is examining problem solving ability for grade school children. Random samples of?5-year-old, 6-year-old, and?7-year-old children are obtained. Each child is given a standardized?problem-solving task, and the psychologist records the number of errors. Test whether there are any significant differences among the three age?groups; use the .05 level of significance.

What is your interpretation of the findings? O A. 5 year olds made more errors than 6 year olds O B. 6 year olds made more errors then 7 year olds O C. 5 year olds made more errors than 7 year olds O D. 7 year olds made fewer errors than 6 year olds