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PSYC 3002 Week 1 Statistics Test – Question and Answers

1. Sarah learns that her 3-year-old scored as well as or better than half of the children in Pam’s language development study. Sarah’s child scored at the _________ percentile.
2. Pam is studying speech development in 3-year-olds in daycare. She observes 30 children over two weeks and takes note of various aspects of the children’s speech. What is the population in this study?
3. Pam wants to know if a new vocabulary intervention increases language development. She administers the intervention to 30 three-year-olds in daycare. She then compares the number of vocabulary words children who received the intervention can say to the number of vocabulary words children who did not receive the intervention can say. What is the independent variable in this study?
4. Continuous variables can contain fractions.
5. A sample is
6. People can be variables in a study.
7. A population is
8. Which of the following statements about bar graphs is false?
9. If a score’s relative frequency is 0.27, what is its percent?
10. Which of the following orders lists the scales of measurement from the scale providing the least specific information to the scale providing the most specific information?
11. Distance in inches is considered a(n) ___________ variable.
12. Temperature in Celsius is measured on a(n) ________________ scale of measurement
13. Correlational studies primarily are done to
14. In a/an ____________, the experimenter measures scores on two variables. In a/an _____________, the experimenter manipulates or changes one variable and measures scores on the other.
15. Suppose you’ve noted that your score is to the left of your friend’s when placed on a normal distribution. This means that your score is ________________ than her score.
16. Pam wants to know if a new vocabulary intervention increases language development. She administers the intervention to 30 three-year-olds in daycare. She then compares the number of vocabulary words children who received the intervention can say to the number of vocabulary words children who did not receive the intervention can say. What is the dependent variable in this study? (PSYC 3002 Week 1 Test)
17. Pam is studying language development in 3-year-olds in daycare. She observes 30 children over two weeks, and takes note of various aspects of the children’s language. What type of statistics should Pam use to summarize the language development of the 30 children?
18. A statistics class has 60% females and 40% males. A researcher selects a sample having 80% males and 20% females. Why should the researcher be cautious of making inferences about the entire class based on the sample?
19. Temperature in degrees Fahrenheit is a clear example of a/an _____________________________ variable.
20. If I want to summarize the characteristics of my statistics class to my friend, I should use