1. Using your answers to numbers 1-3, summarize the effect of the sample size on the size of the standard deviation.

1. O As the sample size gets larger, the standard deviation gets smaller
2. O Standard deviation does not depend on the size of the sample.
3. O As the sample size gets smaller, the standard deviation gets smaller.

2.

In an exit poll, for which the sample size was 3180, suppose that 65% of all voters voted for a recall. Define a binary random variable taking values 0 and 1 that represent the vote for a particular voter (1 vote for the recall). State its probability distribution. Choose the sentence below that best describes the probability distribution.

1. O The binary random variable is the vote for the recall with yes or no. For each observation, P(1) 0.35 and P(0)-0.65
2. O The binary random variable is the vote for the recall with yes or no. For each observation, P(1)-0.65 and P(o) 0.35.
3. O For each random sample of 31 80 people, about 1113voted for recall and 2067 did not
4. O For each random sample of 3180 people, about 2067 voted for recall and 1113 did not.

3. Points Save Answer Question 6 According to a recent survey, the population distribution of number of years of education for self-employed individuals in a certain region has a mean of 13.1 and a standard deviation of 4.2. The size of the random sample was 36.

What is the mean of the sampling distribution

What is the standard deviation of the sampling distribution of x

4. Using the scenario from Question 6, choose the correct description of the mean of the sampling distribution.

1. O The mean of all samples of size 36
2. O The minimum mean for all samples of size 36
3. O The expected value for the mean of a sample of size 36

Answer rating: 100% (QA)

1 Option 2 Standard deviation does not dep... View the full answer