【判断题】One sample has n=6 sores with a mean of M=4. A second sample has n=4 scores with a mean of M=9. If the two samples are combined, the mean for the combined sample M=8.
【简答题】Fill in the blank(s) in each sentence with a phrase from the box in its appropriate form. stake a claim, plow into be proportional to tread on attribute ... to, carve out sidle up breathe down sb’ s n...
【简答题】Please write the word with the following meaning. a . g i v i n g a n a p p e a r a n c e o r i m p r e s s i o n d i ff e r e n t f r o m t h e t ru e o n e