Descriptive and Inferential Statistics

Question 1

Analyze the graph below and answer the question that follows. Based on the location of the observed test value, what would a psychologist conclude about the research results? A. The psychologist would claim that the research results were significant. B. The psychologist would claim that the research results were nonsignificant. C. The psychologist would claim that there is insufficient data in the research. D. The psychologist would claim that the critical values are inaccurate. Please select the best answer from the choices provided

Revolt · Accepted Answer

B

Question 2

If the observed test value of a hypothesis test is outside of the established critical value(s), a researcher would __________.

Revolt · Accepted Answer

claim significant support for the hypothesis

Question 3

Compare and contrast correlation and regression.

Revolt · Accepted Answer

Responses may vary but should include some or all of the following information: Both correlation and regression are used in inferential statistics as types of correlational analysis, which looks at the relationships between variables. However, correlation is used only to determine if a relationship between variables exist, whereas regression is used to determine if one variable influences another or to predict variable outcomes.

Question 4

A negative correlation between two variables indicates that one variable score increases as another variable score decreases.

Revolt · Accepted Answer

T

Question 5

__________ correlation between two variables means that as scores on one variable increase, then scores on another variable also increase.

Revolt · Accepted Answer

A positive

Question 6

The mean, median, and mode of a distribution are __________.A. measures of central tendencyB. measures of variabilityC. types of transformed scoresD. types of deviations

Revolt · Accepted Answer

A

Question 7

Which of the following statements about a normal distribution is not true?A.A normal distribution is represented by a bell-shaped curve.B.A normal distribution has the same value for the mean, median, and mode.C.A normal distribution displays the highest data scores in the middle of the distribution.D.A normal distribution demonstrates how data scores rise and fall within a sample.

Revolt · Accepted Answer

C

Question 8

Compare and contrast measures of central tendency and measures of variability.

Revolt · Accepted Answer

Responses may vary but should include some or all of the following information: Measures of central tendency and measures of variability are both components of descriptive statistics and provide information about data sample scores. However, measures of central tendency provide information about the summary of data scores as represented by the mean, median, and mode. Measures of variability, such as the range and standard deviation, provide information on how far scores are spread out or vary through a distribution.

Question 9

Define statistics and give an example of three types of variables that researchers study using statistics.

Revolt · Accepted Answer

Responses may vary but should include some or all of the following information: Statistics is a set of methods that researchers use to collect and analyze information or data about different variables. An example of a variable can be behavior, facts, performance, beliefs, attitudes, or emotions. Specific examples of variables such as age, height, depression, exercise habits, and self-esteem are also acceptable.

Question 10

Explain why researchers cannot claim causation when examining the relationship between variables.

Revolt · Accepted Answer

Responses may vary but should include some or all of the following information: Researchers cannot claim that one variable causes another because they are not entirely sure which variable impacts the other when examining the relationship between them. Researchers also do not know for sure how many unknown or untested variables influence another variable. Therefore, claiming that one variable causes another would be inaccurate.

Descriptive and Inferential Statistics Answers

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