d) Document Preview: Test 2 Please complete all problems on the test. Cheating will not be tolerated and any offenders risk immediate dismissal from the exam. Raise your hand if you have any questions. Name__________________________________________ Multiple Choice (2 points each; 40 total) 1. What does a standard score represent? The median of the distribution The mean of any given score Standard Deviation The IQR 2. Population parameters of national figures Are often a fixed unchanging figure Are always known Are established through a sampling distribution of different sized samples. Can never really be exactly known. 3. This type of sampling divides the population into subgroups that are equal to the size of the group in the overall population Disproportionate stratified sample Proportionate stratified sample Systemic Random Sample Snowball Sample 4. If I toss two coins in the air, what is the probability that I will get an outcome of 1 Heads and 1 Tails? .25 .5 .75 1 5. As N increases Means generally rise Medians generally decrease Modes generally decrease Standard Errors decrease 6. Which of the following is true about probability samples? Allows the researcher to specify the probability of inclusion for each case in population Are representative as possible of the overall population They are used throughout the social sciences All of the above 7. Which of these fall directly in the middle of the normal distribution? Mean Median Mode All of the above 8. A score in the middle of the normal distribution has a standard deviation of -1 0 1 Not possible 9. Three standard deviations above and below the mean with a normal distribution represent how much of the population? 68% 95% 99% Impossible to approximate 10. Making generalizations about populations from samples is called.. Descriptive Statistics Hypothesis testing Inferential Statistics Quantitative Statistics 11. Students t is the same as z after 100 cases 120 Attachments: Test2-stats.docx