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Identify the scale of measurement for each variable in the dataset (Note: there are 6 variables in this dataset). (12 points)

Identify the scale of measurement for each variable in the dataset (Note: there are 6 variables in this dataset). (12 points)

  • Identify the scale of measurement for each variable in the dataset (Note: there are 6 variables in this dataset). (12 points)
  • Construct a frequency distribution table, including proportion (round to 4 decimal points) and percent columns, for child’s biological sex. (4 points)
  • Sketch an appropriate frequency distribution graph for ethnicity. (4 points)
  • Sketch an appropriate graph showing the frequency distribution of the number of new words learned for children in the child-directed speech group (child-directed speech = Yes). In the same graph, sketch the frequency distribution of the number of new words learned for children in the control group (child-directed speech = No). Use two different colors or use a solid line for one graph and a dashed line for the other). (hint: see problems 20 and 21 in Chapter 2 and homework chapters 1 and 2) (8 points)
  • Calculate the measures of central tendency (all 3) and variability (range and sd) for the number of new words learned by children whose parents engaged in child-directed speech. (10 points)
  • Calculate the measures of central tendency (all 3) and variability (range and sd) for the number of new words learned by children whose parents did not engage in child-directed speech. (10 points)
  • Using your answers for d, e, and f, write a short paragraph comparing the two groups. Does it appear that children’s vocabulary improves when parents engage in child-directed speech for at least 4 hours a day for two weeks? Make sure to report and discuss the distribution shape, the measures of central tendency and the measures of variability for these data in your answer. (8 points)

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