Stats Waiver Exam Questions Answered Correctly Latest Version ()

Stats Waiver Exam Questions Answered Correctly Latest Version () True or False - When researchers rely on authority for knowledge they are using the empirical approach to knowledge - Answers False If there are 200 nurses employed by a hospital and 50 are selected for observation, the 200 are known as a - Answers population True or False - Organizing and summarizing data is only a minor function of statistics - Answers False True or False - Both everyday observation and research can be misleading - Answers True Research differs from everyday observation primary because researchers - Answers plan their observations in advance In which type of study are no treatments given? - Answers Nonexperimental True or False - The participants' responses in an experiment constitute the independent variable - Answers False Suppose a researcher gave welfare recipients 2 types of job training to see which type was more effective in helping them get jobs. Getting jobs is the ______ variable - Answers dependent True or False - the purpose of an experiment is to identify cause and effect relationships - Answers True Which of the following is an example of a nonexperimental study? A survey of political attitudes A study with a control group A sutdy with treatments - Answers A study with a control group Which of the following is obtained when we study samples? Parameters Statistics - Answers Statistics True or False: Using a very large sample is the most important characteristic of a good sample - Answers False Random sampling identifies a sample that: A Contains sampling errors B Is free of all errors C is Biased - Answers A Contains sampling errors True or False: Using random sampling identifies an unbiased sample. - Answers True To determine the opinions of all bicycle owners in a city, a researcher surveys the customers at two bicycle shops that happen to be near her residence. she is using a: A sample of convenience B simple random sample - Answers A Sample of convenience If students name their favorite sport, the resulting data are at what level? A Ordinal B Interval C Ratio D Nominal - Answers D Nominal If an employer ranks employees from low to high on customer service, the employer is using what scale of measurement? A Ordinal B Interval C Ratio D Nominal - Answers A Ordinal What scale of measurement has an absolute zero? A Ordinal B Interval C Ratio D Nominal - Answers C Ratio True or False: The lowest level of measurement is the nominal level. - Answers True True or False: The ratio scale of measurement is a higher level of measurement than the interval scale. - Answers True A percentage is an example of: A an inferential statistic B a descriptive statistic - Answers B a descriptive statistic True or False: A population may be large or small - Answers True An average is an example of: A an inferential statistic B a descriptive statistic - Answers B a descriptive statistic A correlation coefficient is based on one group's performance on how many variables? A one B two or more - Answers B two or more True or False" Inferential statistics are tools that indicate how much confidence researchers can have when they generalize from a sample to a population" - Answers True True or False: "In descriptive statistics, the letter N stands for number of participants in a population. - Answers True If there are 2,000 adult citizens in a town and 20% favor building a new public library, how many favor it? A 200 B 400 C Some other number - Answers B 400 If 25 out of 100 parents favor an extended school day, what percentage favors it? A 2.5 B 25 C 50 D Some other percentage - Answers B 25 True or False: "For a percentage of 79%, the corresponding proportion is .79 - Answers True True or False: Proportions are usually easier to interpret than percentages" - Answers False True or False: A frequency distribution is a table that shows how many participants have each score. - Answers True True or False: "A normal curve is also called a bell-shaped curve" - Answers True When a curve has a tail to the right but no tail to the left, it is said to have a: A Positive skew B Negative skew - Answe