Multiple choice

Question 1 

Given: A box contains a large number of red and blue marbles, but the proportions are unknown. 100 marbles are drawn at random, and 49 turn out to be red. The SE% turns out to be 5%. True or False: The 95% confidence interval for the percentage of red marbles in the sample is 39% to 59% 

False 

True

Question 2

Given: A box contains a large number of red and blue marbles, but the proportions are unknown. 100 marbles are drawn at random, and 49 turn out to be red. The SE% turns out to be 5%. True or False: The percentage of red marbles in the box can be estimated as 49%; the SE% is 5%. 

True 

False

Question 3 

When the sample is only a small part of the population, the number of individuals in the population has almost no influence on the accuracy of the sample percentage. 

True 

False

Question 4

In a month, the Current Population Survey sample amounted to 100,000 people. Of them, 62,000 were employed, and 3,000 were unemployed. True or False: The Bureau would estimate the total number unemployed in the population by using weights obtained by dividing the sample into groups by age, sex, race, area of residence, and so on. 

True 

False