5.11 This exercise is based on summary statistics rather than raw data. This inf

Question

5.11 This exercise is based on summary statistics rather than raw data. This information is typically all that is presented in published reports. You can calculate inference procedures by hand from the summaries. Use the conservative Option 2 (degrees of freedom the smaller of n1 1 and n2 1) for two-sample t confidence intervals and P-values. You must trust that the authors understood the conditions for inference and verified that they apply. This isn't always true.

Do education programs for preschool children that follow the Montessori method perform better than other programs? A study compared 5-year-old children in a certain city, who had been enrolled in preschool programs from the age of 3.

In all, 55 children were assigned to the Montessori school and 113 to other schools at age 3. When the children were 5, parents of 39 of the Montessori children and 31 of the others could be located. Those who were located agreed to and subsequently participated in testing. This information reveals a possible source of bias in the comparison of outcomes. Explain why. (Round your answers to the nearest whole number.)

1. about ? % of Montessori parents participated in the study, compared to about ? % of the other parents

Please solve for the 2 question marks

Thank you!

Explanation / Answer

This information reveals a possible sourcf biasedness in thecomparisiion o outcomes ,

because there are (39/55)*100 = 70.9 (approximately 71%) of the Montessori parents participated in the sdy as compared to about (31/113)*100 =27.43( approximately 27%) of the other parents.

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