Hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error

Answer: null hypothesis

Learn More :

Statistics

• One of the assumptions used when analyzing a simple truss is that the members are joined together by __________.
• What will be the easiest way to determine the force reaction BZ ?
• A plate is supported by a ball-and-socket joint at A, a roller joint at B, and a cable at C. How many unknown support reactions are there in this problem?
• When doing a 3-D problem analysis, you have ________ scalar equations of equilibrium.
• If a support prevents translation of a body, then the support exerts a ___________ on the body.
• If a support prevents rotation of a body about an axis, then the support exerts a ________ on the body about that axis.
• The three scalar equations, FX = FY = MO = 0, are ____ equations of equilibrium in two dimensions.
• The original force and couple system and an equivalent force-couple system have the same _____ effect on a body.
• Internal forces are _________ shown on the free body diagram of a whole body.
• If a support prevents translation of a body, then the support exerts a ___________ on the body.
• A general system of forces and couple moments acting on a rigid body can be reduced to a ___ .
• The moment of a couple is called a _________ vector.
• In statics, a couple is defined as __________ separated by a perpendicular distance.
• If r = {1 i + 2 j} m and F = {10 i + 20 j + 30 k} N, then the moment of F about the y-axis is ____ N·m.
• The triple scalar product u • ( r F ) results in
• When determining the moment of a force about a specified axis, the axis must be along _____________.
• If a particle has 3-D forces acting on it and is in static equilibrium, the components of the resultant force ( Fx, Fy, and Fz ) ___ .
• If a force of magnitude F can be applied in four different 2-D configurations (P,Q,R, & S), select the cases resulting in the maximum and minimum torque values on the nut. (Max, Min).
• For a frictionless pulley and cable, tensions in the cable (T1 and T2) are related as _____ .
• When a particle is in equilibrium, the sum of forces acting on it equals ___ .
• If a dot product of two non-zero vectors equals -1, then the vectors must be ________ to each other.
• If a dot product of two non-zero vectors is 0, then the two vectors must be _____________ to each other.
• The dot product of two vectors results in a _________ quantity.
• The dot product of two vectors P and Q is defined as
• The height of a building, measured in feet, is an example of

Share this

Share on FacebookPlus on Google+