Answer to Question #347354 in Statistics and Probability for Keshi

Question

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, test whether the mean

pressure applied to the driver’s head during a crash test is equal for each types of car. Use α = 5%.

Compact cars Midsize cars Full-size cars

643 469 484

655 427 456

702 525 402

Mean 666.67 473.67 447.33

Standard 31.18 49.17 41.68

deviation

Answer 1

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