PSYCH 311 WSU Exam Questions & Answers Solved

PSYCH 311 WSU Exam Questions & Answers Solved In statistics, we are interested in the population of the larger set of data. True/False - Answer- False College student having to earn research credits for an Introduction to Psychology course is an example of _______ sampling. a) stratified b) convenience c) simple random c) complex - Answer- b) convenience On a ______ scale, the difference between weighting 180 and 190 pounds is the same as weighing 345 and 355 pounds. a) Interval b) Ordinal c) Ratio d) Nominal - Answer- c) Ratio Measuring a group of people's stress levels, religiosity, or amount of depression are examples of ______. a) statistics b) hypothetical constructs c) theories d) variables - Answer- d) variables In which type of research design do you manipulate an independent variable, but do not randomly assign people to groups? a) Quasi-experimental b) Correlational c) Experimental d) Non-experimental - Answer- a) Quasi-experimental Which variable describes an attribute such as hair or eye color, religion, gender, or one's favorite type of Italian food? a) Qualitative b) Quantitative c) Dependent d) Discrete - Answer- a) Qualitative The independent variable has levels. True/False - Answer- True As assumed before taking this class, statistics is a math course. True/False - Answer- False Answering a question with a scale such as Very Happy, Happy, Generally Happy, Generally Unhappy, Unhappy, and Very Unhappy is an example of a(n) _______ scale of measurement. a) Nominal b) Ordinal c) Interval d) Ratio - Answer- In general, the ______ variable is manipulated by the experimenter, and its effects are measured on the ______ variable. a) independent, dependent b) qualitative, quantitative c) dependent, independent d) quantitative, qualitative - Answer- a) independent, dependent The time it takes a rat to run a maze is considered a(n) _______ variable. a) independent b) discrete c) qualitative d) continuous - Answer- d) continuous Descriptive statistics describe the data and can be used to generalize beyond the data at hand and draw conclusions. True/False - Answer- False The following is an example of what? a) Bar Chart b) Histogram c) Line Graph d) Scatter Plot - Answer- b) Histogram The following is an example of what? a) Stem and Leaf Display b) Line Graph c) Scatter Plot d) Bar Chart - Answer- a) Stem and Leaf Display Which of the following would you use to graph qualitative variables? a) Frequency Polygon b) Pie Chart c) Stem and Leaf Display d) Histogram - Answer- b) Pie Chart How would you describe the shape of the distribution of the following graph? a) Bimodal b) Positive c) Symmetrical d) Negative - Answer- b) Positive The following is an example of what? a) Line Graph b) Bar Chart c) Pie Chart d) Scatter Plot - Answer- c) Pie Chart The following is an example of what? a) Scatter Plot b) Histogram c) Bar Chart d) Box Plot - Answer- d) Box Plot Which measure of central tendency is most sensitive to extreme scores? a) Mean b) Median c) Mode d) All are equally affected - Answer- a) Mean The _______ is the midpoint of a distribution. a) Mode b) Range c) Mean d) Median - Answer- d) Median Once we have calculated the sum of squares, we can next use it to compute our formal measure of the average distance from the mean, called the _________. a) Variance b) Standard Deviation c) Deviation Score d) Range - Answer- a) Variance The ________ is the most frequently occurring value in the dataset. a) Range b) Median c) Mode d) Mean - Answer- c) Mode What is the most common measure of central tendency? a) Range b) Mean c) Median d) Mode - Answer- b) Mean The ________ is the simplest measure of variability to calculate and is the highest score minus the lowest score. a) Sum of Squares b) Standard Deviation c) Variance d) Range - Answer- d) Range In relation to the two parts of a z-score, the sign tells us how far away the score is from the center, or mean. True/False - Answer- False Z-scores can tell us how far a score is away from the mean in units of standard deviations, and it what direction. True/False - Answer- True Which of the following is NOT a feature of a normal distribution? a) The mean, median, and mode are equal. b) The area under the normal curve is equal to 1.0. c) They are defined by the mean and standard deviation. d) All are features of a normal distribution. - Answer- d) All are features of a normal distribution. If a z-score has ______ sign, it tells you that the score is below the mean and on the left-hand side of the distribution. a) a positive b) a negative d) no sign - Answer- b) a negative Which of the following is NOT a use of a z-score? a) To compare scores from different distributions. b) To combine information from different measures that are on different scales. c) To see where in the distribution a score falls. d) All are uses of a z-score. - Answer- d) All are uses of a z-score.