A study was conducted to explore the relationship between a girl's birth order and her chance of becoming a juvenile delinquent. The participants were a random sample of girls enrolled in public high schools in a large city. Each girl filled out a questionnaire that asked for her birth order and measured whether she had shown delinquent behavior. The data is given in the table. Oldest In-between Youngest Only child Delinquent Behavior No 285 247 211 70 154.5 Yes 24 29 35 23 Under the null hypothesis, the expected number of girls who are an oldest child with delinquent behavior is: 27.75 37.12

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