A Correlation of R =

question 8

True/False

A correlation of r = .50 in a sample of 15 participants is statistically significant for a two-tailed test at a .05 level of significance.

Describe the impact of fifth wheel positioning on tractor and trailer performance, including ride comfort and legal weight distribution.

Explain the proper methods of attaching fifth-wheel base plates to truck frames.

Understand the role of the upper coupler in the truck-trailer connection.

Identify the SAE standard sizes for kingpins.