Practice quiz 1
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University
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Practice Problem
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Easy
Yixiao Shen
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In medical research, a group of researchers wants to understand the impact of two different treatment methods on patients' recovery time. They divide the patients into two groups, apply treatment method A to one group, and treatment method B to the other group, and then measure the recovery time. This is an experimental study.
True
False
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of social science research, which statement is correct regarding data types?
Quantitative data is typically used to describe attributes and features.
Qualitative data is typically used to measure quantity and metrics.
Qualitative and quantitative data are typically interchangeable in social science.
Quantitative data is typically numeric.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an educational research study, researchers investigated the relationship between students' participation in after-school learning activities and their academic performance. Which of the following may be the mediator variable in this experiment?
School geographical location
Students' motivation for learning
Family background
School education quality
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A meteorologist analyzed the distribution of rainfall in a certain region over the course of a year. He noticed that the distribution of rainfall was relatively uniform during the summer, but during the winter, it became very peaked with extreme rainfall events. This is an example of platykurtic distribution.
True
False
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A television network analyzed the age distribution of viewers for a television show. Audience age is a continuous variable, and the data shows a left-skewed distribution, with most viewers being younger. In this scenario, which of the following statistics should he use to report the central trend in audience age?
Mode
Median
Mean
Standard Deviation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A demographer studied the human life span in Wenzhou City and found that most people live longer, but a few people live shorter lives due to diseases, accidents, and other reasons. In this case, what type of frequency distribution does the human life span in Wenzhou belong to? What is the relationship between mean and median?
Positively skewed; mean > median
Positively skewed; mean < median
Negatively skewed; mean < median
Negatively skewed; mean > median
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