Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars, midsize cars, and full-size cars. It collects a sample of three for each of the treatments (cars types). Using the hypothetical data provided below, run your analyses in R to test whether the mean pressure applied to the driver’s head during a crash test is equal for each types of car (higher pressure = less safe). Compact Car Midsize Car Full-Size Car 643 469 484 655 427 456 702 525 402
Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars, midsize cars, and full-size cars. It collects a sample of three for each of the treatments (cars types). Using the hypothetical data provided below, run your analyses in R to test whether the mean pressure applied to the driver’s head during a crash test is equal for each types of car (higher pressure = less safe). Compact Car Midsize Car Full-Size Car 643 469 484 655 427 456 702 525 402
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 11PPS
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Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars, midsize cars, and full-size cars. It collects a sample of three for each of the treatments (cars types). Using the hypothetical data provided below, run your analyses in R to test whether the
Compact Car |
Midsize Car |
Full-Size Car |
643 |
469 |
484 |
655 |
427 |
456 |
702 |
525 |
402 |
- What kind of statistical analysis do you need to use and why?
- State the null and alternative hypotheses.
- Check your assumptions. Include screenshots of your R output and explain why each of them are or are not met.
- Using R, run your analysis and include a screenshot.
- Using R, run post-hoc tests and include a screenshot.
- What do you conclude about the null hypothesis?
- What does each of your p-values tell you? Are there differences and in which comparisons?
- Explain what your p-values are telling you regarding the safety of the cars.
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What does the p values tell us about the safety of the car?
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