Represent data on two quantitative variables with a scatter plot, and describe how the variables are related. a. Fit a quadratic, higher degree polynomial, or radical function to data. Use functions fitted to data to solve problems in the context of the data. b. Informally assess the fit of a quadratic, higher degree polynomial, or radical function visually by analyzing the graph and analytically by evaluating the appropriateness of the chosen model in representing the data and context.
Example Problems
Tom took 4 exams. His mean was and his standard deviation was . What scores did Tom receive on his exams?
a. Write two sets of 5 different numbers that have the same mean but different standard deviations.
b. Write two sets of 5 different numbers that have the same standard deviations but different means.
b. Write two sets of 5 different numbers that have the same standard deviations but different means.
Jim has taken 4 exams in his Statistics class.
Calculate the standard deviation of Jim's scores and explain how this value represents the variability in his test scores.
| Exam | Score |
|---|---|
| 1 | 92 |
| 2 | 84 |
| 3 | 96 |
| 4 | 100 |
Calculate the standard deviation of Jim's scores and explain how this value represents the variability in his test scores.
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