A Company That Manufactures Helmets Wants to Test Their Helmets

Essay

A company that manufactures helmets wants to test their helmets to make sure they pass SNELL certification.One of the tests the helmets are required to undergo is a test that simulates real-world impacts.During the test,crash dummies must,on average,experience a force of nearly 300 g in order to pass.The company tests 36 helmets and finds the dummy experienced an average of 298 g with a standard deviation of 8 g.
a.Specify the null and alternative hypotheses to determine whether the company's helmets experience,on average,less than 300 g during the SNELL test.
b.Calculate the value of the test statistic,and find the critical value at a 10% significance level.
c.At the 10% significance level,can you conclude that the company's helmets experience less than 300 g during the SNELL test? Explain.