1.Suppose 34% of respondents to a Gallup poll answered that they were unhappy with their employment. What is the proportion of sample respondents that are unhappy with their employment?

2.The difference in the means of two independent samples has __________ variability than the mean of the differences in a matched-pairs sample. (Assume sample sizes are comparable and the values in the pairs are positively correlated.)

3.For a 95% confidence interval, the value of 95% is called the _______________.