In scientific opinion polling, a random sample is used to avoid:

bias

Step-by-step explanation:

Samples are randomized to ensure that the people polled are representative of the entire population.  If a sample is not representative of the population, it is said to be biased.  Randomization helps to prevent bias.

d (5 x (-20)) * (100 x (0.7))

step-by-step explanation:

5÷1/100 * -.7 *-20

copy dot flip

5*100 * -.7 *-20

rearrange

5*-20   * 100 *-.7

-100   *-70

7000

step-by-step explanation:

through just a quick inspection, one can see that the graph of this cubing function starts in quadrant iii and ends in quadrant i.   when x = 0, y = 3, so the y-intercept is (0, 3).

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