Wildlife biologists inspect 153 deer taken by hunters and find 32 of them carrying ticks that test positive for Lyme disease. What concerns do you have about this sample?

In a May 2007 Experian/Gallup Personal Credit Index poll of 1008 U.S. adults aged 18 and over, 8% of respondents said they were very uncomfortable with their ability to make their monthly payments on their current debt during the next three months. A more detailed poll surveyed 1288 adults, reporting similar overall results and also noting differences among four age groups: 18-29, 30-49, 50-64, and 65+. Do you expect this second poll's overall margin of error to be larger or smaller than the Experian/Gallup poll's? Explain.

Deer ticks are of concern because they can carry the parasite that causes Lyme disease. One study found a relationship between the density of acorns produced in the fall and the density of deer tick larvae the following spring. The relationship can be approximated by the linear function $f(x)=34 x+230$ where x is the number of acorns per square meter in the fall, and f(x) is the number of deer tick larvae per 400 square meters the following spring. (a) Approximately how many acorns per square meter would result in 1000 deer tick larvae per 400 square meters? (b) Find and interpret the slope of the line.

A TV news reporter says that a proposed constitutional amendment is likely to win approval in the upcoming election because a poll of 1505 likely voters indicated that 52% would vote in favor. The reporter goes on to say that the margin of error for this poll was 3%. What confidence level did the pollsters use?

Wildlife biologists inspect 153 deer taken by hunters and find 32 of them carrying ticks that test positive for Lyme disease.

What concerns do you have about this sample?

A TV news reporter says that a proposed constitutional amendment is likely to win approval in the upcoming election because a poll of 1505 likely voters indicated that 52% would vote in favor. The reporter goes on to say that the margin of error for this poll was 3%. Explain why the poll is actually inconclusive.

Wildlife biologists inspect 153 deer taken by hunters and find 32 of them carrying ticks that test positive for Lyme disease.

If the scientists want to cut the margin of error in half how many deer must they inspect?

Wildlife biologists inspect 153 deer taken by hunters and find 32 of them carrying ticks that test positive for Lyme disease. Create a 90% confidence interval for the percentage of deer that may carry such ticks.

Find the product. (y - 2)(y + 4)

In 2004 ACT, Inc., reported that 74% of 1644 randomly selected college freshmen returned to college the next year. The study was stratified by type of college-public or private. The retention rates were 71.9% among 505 students enrolled in public colleges and 74.9% among 1139 students enrolled in private colleges. Do you expect the margin of error for the overall retention rate to be larger or smaller? Explain.

Pew Research, in November 2011, polled a random sample of 799 U.S. teens about Internet use. 49% of those teens reported that they had misrepresented their age online to gain access to websites and online services. Find that margin of error.

Use the given function f to: Find the domain of f. $f(x)=1+3^{-x}$

Label each reactant in the reaction below as a proton donor or a proton acceptor and as acidic or basic.

$$\mathrm { H } _ { 2 } \mathrm { CO } _ { 3 } + \mathrm { H } _ { 2 } \mathrm { O } \Longleftrightarrow \mathrm { HCO } _ { 3 } ^ { - } + \mathrm { H } _ { 3 } \mathrm { O } ^ { + }$$

Pew Research, in November 2011, polled a random sample of 799 U.S. teens about Internet use. 49% of those teens reported that they had misrepresented their age online to gain access to websites and online services. If we only need to be 90% confident, will the margin of error be larger or smaller? Explain.