Referring to Exercise 17.8, it seems obvious that the sample sizes do not reflect the relative frequency of these characteristics in the population. Would you expect the mean for all these primiparous mothers to be a good estimate of the population of primiparous mothers? Why or why not?

Exercise 17.8

In a study of mother–infant interaction, mothers are rated by trained observers on the quality of their interactions with their infants. Mothers were classified on the basis of whether this was their first child (primiparous versus multiparous) and whether the infant was low birth weight (LBW) or full-term (FT). (Full term generally means normal birth weight.) The data represent a score on a 12-point scale, on which a higher score represents better mother–infant interaction.

Run and interpret the appropriate analysis of variance.

Transcribed Image Text:

Primip/LBW Primip/FT 6 5 Multip/LBW Multip/FT 678 578c 5 4 96 7 6 7 8 9 8 622 88 26 5 7 7 1 9 9 8 20 5 5780 9 8 9 9 3 10 9 8 7 10