Draw a Sketch for the Problem and Solve It

question 28

Multiple Choice

Draw a sketch for the problem and solve it. A rocker arm raises oil from an oil well. On each stroke, it lifts a weight of 3 tons on a weight arm 1 ft long. What force is needed to lift the oil on a force arm 2 ft long?

• A) 0.75 ton
• B) 3 tons
• C) 6 tons
• D) 12 tons
• E) 1.5 tons

---

Definitions:

Margin of Error

The range of values below and above a sample statistic in a survey that estimates the reliability or precision of the sample statistic as an approximation of the population parameter.

Prediction Interval

A range of values that is likely to contain the value of an unknown parameter for future observations.

Margin of Error

Margin of Error is a statistic expressing the amount of random sampling error in a survey's results, indicating the potential variability in the results.

Confidence Intervals

An interval of values, sourced from statistical analyses of a sample, that is conjectured to include the value of a mysterious population parameter.