1. Unit 10 Quiz: Review questions

2. Can you explain your answer?
Use your fingers to indicate your answer: 1=A, 2=B, 3=C, 4=D.
After viewing the question, show me your answer in 15 seconds.
Next, turn to your neighbor and you have one minute to convince him/her that you are right.

3. “A sampling distribution is a distribution of the means
“A sampling distribution is a distribution of the means. You obtain a sample from the population, compute the mean, put the sample back and repeat the same process many times. Afterwards, you get a sampling distribution.” Is it a good definition of sampling distribution?
Yes No

4. CNN did a poll to show the approval rating of Trump
CNN did a poll to show the approval rating of Trump. The sample size is 1,000. A critic said that this poll is invalid because this sample is a very small portion of the entire US population. Is he right?
Yes No

5. We need at least 30 subjects to create a normal sampling distribution
We need at least 30 subjects to create a normal sampling distribution. Is it right?
Yes No

6. Which of the following distribution is more likely to produce a normal sampling distribution?
Skewed
Uniform
Bimodal
All of the above

7. When we infer from the sample to the population, what is the ideal?
unbiased estimation, high variance
unbiased estimation, low variance
systematic estimation, high variance
systematic estimation, low variance