Question : 1. Jasper has conducted a study for his master’s thesis and : 1201772

1. Jasper has conducted a study for his master’s thesis and is planning to analyze the data he collected. Looking at the descriptive statistics will allow Jasper to 
A. establish the likelihood that a particular correlation was due to chance.
B. summarize a data set.
C. draw conclusions about what their data mean.
D. determine whether or not the differences between two groups are significant.

2. A team of researchers have concluded their study on the effects of self-efficacy on test performance. First, the team wants to describe and present their data. Then, they want to draw conclusions from the data to understand what the data mean. In other words, the team will first evaluate the _____ statistics and then evaluate the _____ statistics. 
A. standard; percentile
B. percentile; standard
C. descriptive; inferential
D. inferential; descriptive

3. In her study of the effects of distractions on driving ability, Mandy has developed a null hypothesis that she will test. This null hypothesis states that 
A. the dependent variable will have no effect on the independent variable.
B. the independent variable will have no effect on the dependent variable.
C. no dependent or independent variable exists.
D. there is a negative correlation between the dependent and independent variables.

4. When Susan did a study looking at the drinking habits of undergraduates, she suspected the results would show that the amount a student drank would be related to his or her grade point average (GPA). Instead, she found that alcohol consumption was not related to GPA. This means that 
A. Susan’s hypothesis was true.
B. there was a negative correlation between alcohol consumption and GPA.
C. there was a positive correlation between alcohol consumption and GPA.
D. the null hypothesis was supported.

5. Dr. Smith is conducting an experiment to discover the effects of money payments (independent variable) on work performance (dependent variable). Dr. Smith’s null hypothesis would state that: 
A. The size of the payment will not affect the level of work performance.
B. The larger the payment, the higher the level of work performance.
C. The smaller the payment, the lower the level of work performance.
D. If no payments are made, no work will be done.

6. If you wanted to visualize or understand the “shape” of a data set, it would be most useful to use a 
A. t test.
B. frequency histogram.
C. null hypothesis.
D. standard deviation.

7. Professor Rose has just completed an experiment in which he observed how many times a particular color was selected when 100 people were each given a choice of red, green, or blue. He represents the data graphically by constructing three boxes (labeled Red, Green, and Blue) whose heights are proportional to the number of times each color was chosen. Professor Rose has constructed a(n) _____ of the data. 
A. histogram
B. height chart
C. central tendency measure
D. analysis of variance

8. For his class project, Kiefer is trying to determine what statistics he needs to present to his professor. He thinks that a frequency histogram will be helpful because it will 
A. establish that his null hypothesis is true.
B. determine whether an analysis of variance is needed.
C. calculate t test values.
D. reveal the “shape” of the data.

9. Which of the following is not one of the basic categories of descriptive statistics? 
A. Calculating the results of a t test
B. Summarizing the typical value of a set of data
C. Expressing the correlation between two sets of data
D. Counting the number of observations made

10. Your instructor comes to class with the results of the last quiz. She tells you that the average score was 7 (out of a possible 10) and that the median was 6. These are measures of 
A. dispersion.
B. central tendency.
C. variance.
D. range.