A Company That Manufactures Helmets Wants to Test Their Helmets

question 105

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.

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Definitions:

Dependent Chart

A graphical representation of data where the display depends on the selection or values input from another data set or chart element.

Cell Reference

A way to identify a particular cell in a spreadsheet by its column letter and row number, enabling easy data manipulation and calculations.

Paste Operation

The action of inserting text, files, images, or other data from the clipboard into a new location.

Formula Copy

Copying an equation or formula in software applications in such a way that the references adjust relative to the position of the new copy.