Question

calculate sarahs mean length of utterance (mlu) at the age of 30 months. age 30 mo look at that train. dont have paper. joshua throw like penguin. i gonna come in. mlu:

Explanation:

Step1: Count words in each utterance

"Look at that train." has 4 words, "Don't have paper." has 3 words, "Joshua throw like penguin." has 4 words, "I gonna come in." has 4 words.

Step2: Calculate the sum of words

$4 + 3+4 + 4=15$

Step3: Divide by number of utterances

There are 4 utterances. So, $\frac{15}{4}=3.75$

Answer:

$3.75$