13) Children between 9 and 18 months old can say an average of ten words. Natasha is a very dedicated daycare educator. She works hard for her little ones to develop their vocabulary. Her baby group consists of 6 children aged 9 to 18 months. The little ones in her group say an average of eight words with a standard deviation of 1.75. For example, Marylou, 9 months old, says four words: dad, mom, hand and nose. Natasha wants to know if the vocabulary of the little ones in her group differs from that of the children of the population.

a) In this research question, what would the null hypothesis be? (2 points)

b) In this research question, what would be the alternative hypothesis? (2 points)

c) Use the appropriate test to answer the question and present all of your calculations. (15 points) d) What is your decision regarding the results. (3 points)

e) Present your results scientifically. (3 points)