During a period of 11 years 653 of the people selected for grand jury duty were sampled, and 72% of them were immigrants. use the sample data to construct a 99% confidence interval estimate of the proportion of grand jury members who were immigrants. given that among the people eligible for jury duty, 68.7% of them were immigrants, does it appear that the jury selection process was somehow biased against immigrants?

99% confidence interval estimate of the proportion of grand jury members who were immigrants would be 0.72±0.045, that is (0.675, 0.765) or (67.5%, 76.5%)

Since 68.7% falls in the confidence interval, there is no significant evidence that the jury selection process was somehow biased against immigrants

Step-by-step explanation:

Confidence Interval can be calculated using p±ME where

and margin of error (ME) can be found using the formula

ME= where

Then ME= ≈ 0.045

99% confidence interval would be 0.72±0.045, that is (0.675, 0.765)

d. vertex

step-by-step explanation:

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)