Casual relationship based on correlation research
What are the two reasons you can't conclude you have demonstrated a casual relationship based on correlation research?
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A large midwestern state administers a statewide mathematics exam that has an average of 500. A researcher is designing a study to test the idea that students from charter schools score higher than average on the test.
A 30.84mL volume of 0.128M NaOH is required to reach the phenolphthalein endpoint in the titration of a 5.441g sample of vinegar. Calculate the percent acetic acid in the vinegar.
A large company wanted to know how the average salary of their employees had changed over the last year. The results of their study had a p-value of .12 and showed that the average salary had increased by $1,500 from $20,000 to $21,500.
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A plane is moving due north, directly towards its destination. Its airspeed is 200 mph. A constant breeze is blowing from west to east at 30 mph. At what rate is the plane moving north? (please show work, I don't just want the answer)
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A researcher measures the following scores for a group of people. The X variable is the number of errors on a math test, and the Y variable is the person's level of satisfaction with his/her performance.
A crate of weight W is being pushed across a horizontal surface by a force directed at an angle of 20 degrees below the horizontal. What is the magnitude of the normal force on the crate?
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