In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation instatistical polling is the margin of error - the largest (reasonble) error that the poll could have. Forexample, a poll result of 72% with a margin of error of 4% indicates that p is most likely to be between68% and 76% (72% minus 4% to 72% plus 4%).In a (made-up) poll, the proportion of people who like dark chocolate more than milk chocolate was44% with a margin of error of 2.2%. Describe the conclusion about p using an absolute valueinequality.The answer field below uses the symbolic entry option in Mobius. That lets you type in a vertical bar |to represent absolute values. Also, when you type in < and then =, the symbolic entry option willautomatically convert that to <. In the same way, if you type in > and then =, the symbolic entryoption will automatically convert that to >.

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Answered: In politics, marketing, etc. we often…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Light Bulb Sample Data Set GOOD BAD BAD GOOD GOOD GOOD BAD GOOD BAD BAD GOOD GOOD 25. Consider the Light Bulb Sample Data Set above which represents a small sample of light bulbs which were tested to see which ones were GOOD and which ones were BAD. Find the sample proportion q of BAD light bulbs. A. В. С. D. 2 12 12
You want to estimate the proportion of home accident deaths that are caused by falls. How many home accidents must you survey in order to be 94% confident that your sample proportion is within four percentage points of the true population proportion?
In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation in statistical polling is the margin of error - the largest (reasonble) error that the poll could have. For example, a poll result of 72% with a margin of error of 4% indicates that p is most likely to be between 68% and 76% (72% minus 4% to 72% plus 4%). In a (made-up) poll, the proportion of people who like dark chocolate more than milk chocolate was 37% with a margin of error of 2.5%. Describe the conclusion about p using an absolute value inequality. . That lets you type in a vertical bar | to represent absolute values. Also, when you type in < and then =, the symbolic entry option will automatically convert that to ≤ . In the same way, if you type in > and then =, the symbolic entry option will automatically convert that to ≥. Be sure to use decimal numbers in your answer (such as using 0.40 for 40%).
Recherchers conducted two surveys about teens are their use of social media. The First survey asked a Random sample of 800 U.S. teens about their use of Instagram. A second survey asked the same question to a Random sample of 2253 Canadian teens. In these two studies. 73% of U.S. teens and 88% of Canadian teens said that they use instagram. Use these results to answee the following questions about the proportion of U.S. and Canadian teens that use instagram. (Round to the nearest whole hundredth as needed).
We'd like to know the percentage of people living in California who owns a cell phone. How many people in California must be surveyed in order to be 95% confident that the sample proportion is in error by no more than 4 percentage points?
How often do you go out dancing? This question was asked by a professional survey group on behalf of the National Arts Survey. A random sample of 95 single men showed that 24% went out dancing occasionally. Another random sample of 92 single women showed that 21% went out dancing occasionally. Is the proportion of single men who go out dancing occasionally higher than the proportion of single women? Use a 5% level of significance. If men are group 1 and women are group 2, what is the p-value for this hypothesis test? 0.656 0.688 0.344 0.217 0.242
A drug company claims that an allergy medication causes headaches in 5% of those who take it.A medical researcher believes that more than 5% of those who take the drug actually get headaches. Identify the population(s): All individuals who take the medication. The proportion of those who take the drug who get a headache. What is the variable being examined for individuals in the population(s)? Whether or not an individual who does not take the drug gets a headache. Whether or not an individual takes the correct dosage of the drug. Whether or not an individual who takes the drug gets a headache. Is it categorical or quantitative? [Proportions are Categorical. Mean values are Quantitative.] Categorical Quantitative Identify the parameter(s): The proportion of those who take the drug who get a headache. The mean amount of medication taken. The number individuals who take the medication. What kind of hypotheisis test is this? 1 population mean 2 population means 2…
Please answer questions below Below is a sample of 64 responses of a survey of Ward 3 residents in Washington, D.C. The survey asked "Do you support the statehood of Washington, D.C.?" "Yes" was recorded as "1" and "No" was recorded as "0" in the table. Statehood? a. What is the sample proportion of residents who support DC statehood? 1 1 1 1 0 1 b. If the population proportion of residents who support DC statehood is 0.7, 1 what is the standard error of the proportion? 0 0 0 1 1 c. Is the sampling distribution of the proportion normally distributed? 0 1 1 0 1 d. What is the probability of a sample proportion being greater than 1 the value of…
When you hear thw words “population” and “sample,” what comes first in your mind?
a researcher wants to find the proportion. what size sample should be obtained in order to be 90% confident that the sample proportion will not differ from the true proportion by more than 3%. Round to nearest whole number
just the last multiple choice question, thank you!
The Student Union President conducted a survey to estimate the proportion of first year students who participated in the social activities organized by the Student Union. Which of the following surveying options does NOT affect the presidents ability to generalize the survey to all first year students. The president put the survey on the Student Union webpage a Monday and collected the responses at the end of the week. All of the other options present a problem for generalizing the results. The president polled all students coming out of the Student Union on a given Monday. The freshmen class consists of 3000 students. A random sample of only 300 were sent a survey. Only 150 responded. The survey was sent only to first year students enrolled in statistics courses because all students need to satisfy a statistics general education requirement.

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