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- 1. Multiple Choice
How is the graph distributed?
Approximately Normal
Skewed to the Left
Skewed to the Right
Uniform
- 2. Multiple Choice
If a distribution is approximately NORMAL , what percentage of data falls within 1 standard deviation?
25%
68%
95%
99.7%
- 3. Fill in the Blank
What is the mean on the graph given?
- 4. Fill in the Blank
What is the standard deviation on the graph given?
- 5. Multiple Choice
The shelf life of a particular dairy product is approximately normally distributed with a mean of 12 days and a standard deviation of 3 days.
About what percent of the products last between 12 and 15 days?
68%
34%
16%
2.5%
- 6. Multiple ChoiceAccording to the empirical rule, how much of the data falls within 3 standard deviations?25%68%95%99.7%
- 7. Multiple ChoiceWhat is the Normal Range (68%) of the annual precipitation for Phoenix, if the average is 29 with a standard deviation of 3?26-323-2926-2939-32
- 8. Multiple Choice
What is the formula to find the z-score for population?
z=X-M
z=σ-M/μ
z/M=μ
z=X-μ/σ
- 9. Multiple Choice
Find the Z-score.
Mean = 22
Standard Deviation: 3.1
x = 29
2.26
16.45
-2.26
1.26
- 10. Multiple Choice
298
296
220
380
- 11. Multiple Choice
It means you did better than zero people.
It means you scored the same grade as the average grade.
It means you earned a zero on the quiz.
It means the average score was a zero.
- 12. Multiple Choice
Test has a mean of 40, standard deviation of 10. What is the percent of people with a score below 37?
52.97%
31.53%
48.99%
38.21%
- 13. Multiple ChoiceWhat is the Z-score for Tina if she got a 31 on the ACT, the mean was 23 and the SD was 4?+0.2+2.0-2.0-0.2
- 14. Multiple Choice
One group of subjects was given an herbal supplement and another group was given a placebo. After one year, the number of illnesses each group had was compared.
Observational Study
Experiment
- 15. Multiple Choice
A researcher stood at a school parking lot entrance to see if the color of a car is related to the driver not wearing a seatbelt.
Observational Study
Experiment
- 16. Multiple Choice
A researcher randomly assigned boys and girls to each of two groups. One group was assigned to watch a violent television program while the other group watched a nonviolent program. The children's behavior was then recorded for incidences of aggressive behavior. This research method is best characterized as...
experimental
Observation
- 17. Multiple Choice
The disadvantage of this method of descriptive research is that the data is limited to only answering the question(s) asked. These limitations lead to biases, ambiguous conclusions, and low participation rates among research populations.
Experiments
Observational
Survey
- 18. Multiple Choice
The disadvantage of this method of descriptive research is that the data is limited to only answering the question(s) asked. These limitations lead to biases, ambiguous conclusions, and low participation rates among research populations.
Experiments
Observational
Survey
- 19. Multiple ChoiceA numerical characteristic of the POPULATIONStatisticParameterObservationStudy
- 20. Multiple ChoiceIn a survey of a sample of computer users, 8% said their computer had a malfunction that needed to be repaired by a service technician.parameterstatistic
- 21. Multiple ChoiceThe population describes:The group of people being surveyedpart of the group being surveyedthe whole worldthe school
- Answer choicesTagsAnswer choicesTags