t has been estimated that only about 25% of California residents have adequate earthquake supplies. Suppose we are interested in the number of California residents we must survey until we find a resident who does not have adequate earthquake supplies.   A) How many California residents do you expect to need to survey until you find a California resident who does not have adequate earthquake supplies?  B) How many California residents do you expect to need to survey until you find a California resident who does have adequate earthquake supplies?

In February 2021, the Chicago Tribune reported:“The overdose epidemic that has ravaged Chicago has not spared the nearby suburbs, some of which have death rates comparable to anything seen in the city, according to a report released this week by the Cook County Department of Public Health. ZIP codes in the towns of Worth, Broadview, Maywood, and Forest Park, areas that “have substantially lower median household incomes and higher poverty rates,” have been especially hard-hit, the report said.”In the article, they claimed that lower incomes were associated with higher overdose death rates and that overdose death rates are increasing over time. The data you have been analyzing wasn’t focused on Chicago, obviously. But do your results support the general gist of the statistical argument being made in this Tribune excerpt? Please address:• Do overdose death rates appear to be associated with per capita income (use scatterplot)?• Do overdose death rates appear to be increasing over time…

The brand manager for a brand of toothpaste must plan a campaign to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 98% confident that his estimate is within five percentage points of the true population percentage? (Assume that nothing is known about the percentage of adults who have heard of the brand.)

From the given scenario, define the population proportion. In 2019, a national survey organization asked the question "Do you go on more than two vacations per year?" to a random sample of 2,000 Americans. 580 responded "Yes", while the other 1,420 people responded "No".   Group of answer choices:   A) the proportions of the sampled Americans who go on more than two vacations per year   B) the proportion of all Americans who go on more than two vacations per year   C) the 1,420 people who responded "No"   D) the 2,000 Americans