In a normal distribution, what percentage of the population is within 1 SD of the mean? What about within 2 SD?

What will be an ideal response?


A measure of 1 SD above and 1 SD below the mean (±1 SD) includes 68 percent of the population, while ±2 SD includes 95 per-cent of the population. The 5th to 95th percentiles are nearly 2 standard deviations on either side of the mean.

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Name the views shown on the drawing.

Review drawing number 522923A0A and then answer the following questions.

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____________________ after boring provides a much more satisfactory surface for new rings and promotes longer ring life.

Fill in the blank(s) with the appropriate word(s).

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The following utility function was calibrated based on an observed mode split of 84.9% private auto use and 15.1% bus use. Utility function: Uk = Ak – 0.10 X1 – 0.13 X2 – 0.12 X3 – 0.0045 X4 After implementing service improvements to the buses, the mode split changed to 81.6% private auto use and 18.4% bus use. Determine a value for the calibration constant for the bus mode that reflects this shift in mode split.

A mode choice logit model is to be developed based on the following information. A
survey of travelers in an area with bus service found the following data:


What will be an ideal response?

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The load capacity of a simple block and tackle is equal to the capacity of the _____

a. sheave b. hook c. load line d. pulley

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