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Based on the researcher's goal to describe the typical or average scores in this distribution, explain which category of descriptive statistics they should use and identify the specific measures they might calculate.
Case context: A developmental psychology researcher collects data on the number of words spoken by a sample of toddlers during a standardized observation period. The researcher wants to summarize the dataset to understand the typical performance of the group rather than looking at each individual toddler's score.
Question: Based on the researcher's goal to describe the typical or average scores in this distribution, explain which category of descriptive statistics they should use and identify the specific measures they might calculate.
Sample answer: The researcher should use measures of central tendency to describe the typical, center, or average scores of the toddlers' word counts. Specifically, they might calculate the mean, median, or mode to summarize this distribution.
Key points:
- Identifies the need for measures of central tendency.
- Explains that these measures are used to summarize the typical or center score of the dataset.
- Names the mean, median, and mode as the specific descriptive statistics to calculate.
Rubric: Full credit is given for correctly identifying measures of central tendency as the appropriate category and explaining that the mean, median, and/or mode are the specific statistics used to find the typical score in the distribution.
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Research Methods in Psychology - 4th American Edition @ KPU
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Interpreting a 'Typical' Value
A developmental psychologist studies the number of words spoken in a day by a group of 20 toddlers. The data shows a wide variation, with some toddlers speaking very few words and others speaking many. The psychologist wants to calculate a single value to best represent the 'typical' number of words spoken by a toddler in this group. What is the primary justification for this statistical approach?
Median
Mode
Mean
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