How safe are child car seats? Consumer Reports (May 2005) tested the safety of c
ID: 3020097 • Letter: H
Question
How safe are child car seats? Consumer Reports (May 2005) tested the safety of child car seats in 30 mph crashes. They found “slim safety margins” for some child car seats. Suppose that Consumer Reportssimulates the safety of the market-leading child car seat. Their test consists of placing the maximum claimed weight in the car seat and simulating crashes at higher and higher miles per hour until a problem occurs. The following data identify the speed at which a problem with the car seat first appeared; such as the strap breaking, seat shell cracked, strap adjuster broke, detached from the base, etc.: 30.7, 32.7, 35.9, 35.6, 30.8, 31.6, 30.8, 32.0, 35.7, 33.1, 33.5, 29.2. Let µ denote the true mean speed at which a problem with the car seat first appears. The following MINITAB output gives the results of using the sample data to test H0: µ = 30 versus Ha: µ > 30.
How safe are child car seats? Consumer Reports (May 2005) tested the safety of child car seats in 30 mph crashes. They found “slim safety margins” for some child car seats. Suppose that Consumer Reportssimulates the safety of the market-leading child car seat. Their test consists of placing the maximum claimed weight in the car seat and simulating crashes at higher and higher miles per hour until a problem occurs. The following data identify the speed at which a problem with the car seat first appeared; such as the strap breaking, seat shell cracked, strap adjuster broke, detached from the base, etc.: 30.7, 32.7, 35.9, 35.6, 30.8, 31.6, 30.8, 32.0, 35.7, 33.1, 33.5, 29.2. Let µ denote the true mean speed at which a problem with the car seat first appears. The following MINITAB output gives the results of using the sample data to test H0: µ = 30 versus Ha: µ > 30.
Explanation / Answer
we have p value that is 0.0008
since p value is 0.0008 there is no strong evidence
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