2 . Standard deviation and variance for a population You are interested in the development of language in bilinguals. You are able to locate five families in the world with 18-month-old toddlers who are learning both Thai and Norwegian simultaneously. Given that these are the only families that fit this qualification, therefore, these five families are your study population. You test the children to see how many words they can speak in Thai. The results are listed in the following table: Toddler Number of Words in Thai A 26 B 48 C 37 D 28 E 41 Calculate the mean for this population. = Complete the following table. Toddler Number of Words (X) X - (X - ) A 26 B 48 C 37 D 28 E 41 Calculate the variance and standard deviation for this population. = =