Question 1181875: 9) A developmental psychologist studies the number of words seven infants have learned at a particular age. The numbers are: 10, 12, 8, 0, 3, 40, and 18. Figure the
(a) mean,
(b) median, and
(c) standard deviation for the number of words learned by these seven infants.
(d) Explain what you have done and what the results mean to a person who has never had a course in statistics.
Found 2 solutions by ikleyn, Boreal:
Answer by ikleyn(52898)   (Show Source):
You can put this solution on YOUR website! .
Go to web-site
https://www.calculator.net/mean-median-mode-range-calculator.html
Find there online calculator for mean and median, along with the nice
professional and educational descriptions of these notions.
Use it and get the answer on your own.
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Regarding standard deviation, go to web-site
https://www.calculator.net/standard-deviation-calculator.html
Find an online calculator there, along with the nice
professional and educational descriptions of this notion and the formula.
Use it and get the answer on your own.
Answer by Boreal(15235)  (Show Source):
You can put this solution on YOUR website! The mean is 13 (91/7) words
The mean is the middle of the 7 ordered numbers, or the fourth. It is 10 words.
The sd is 13.28 words.
The typical number of words is 13 for the infants, but the variability is quite large, and the range is from 0 to 40. Most of the values cluster from 0 to 18 words.
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