The survey used a ______ sample of two thousand people across the Midwest.
A: random
B: relaxed
C: relieved
D: reluctant
A: random
B: relaxed
C: relieved
D: reluctant
举一反三
- 中国大学MOOC: 11. Fill in the blanks with the following words: random randomly randomize The survey used a _____________ sample of two thousand people across England and Wales.
- Our survey used a ________sample of 500 college students across the country.
- Which are the common used ways to sampling? A: Simple random sample without replacement B: Simple random sample with replacement C: Stratified sample D: Cluster sample
- A researcher wants to estimate the difference in the means of two populations. A random sample of 36 items from the first population results in a sample mean of 430. A random sample of 49 items from t
- Two thousand dollars ______ (have) been used up.