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 was32% with a margin of error of 1.6%. 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 >.Be sure to use decimal numbers in your answer (such as using 0.40 for 40%).

Given: The proportion of people who like dark chocolate more than milk chocolate is 32% Margin of…

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

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 95% confident that his estimate is in error by no more than two percentage points? Complete parts (a) through (c) below.
SAT Math Suppose that scores on the SAT Math test are approximately normal with a mean of 500 and a standard deviation of 100. Let X denote the score on a randomly selected student. Use the Z table to find the following values.
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?
The table to the right is based on the assumption that 1% of breast tumors are malignant. It also assumes that mammogram screening is 90% accurate. Complete parts (a) through (c) below. Positive Mammogram Negative Mammogram Total % (Type an integer or decimal rounded to the nearest tenth as needed.) b. What is the chance of a positive mammogram, given that the patient has cancer? % (Type an integer or decimal rounded to the nearest hundredth as needed.) Tumor is Tumor is Malignant Benign 90 1206 a. Suppose a patient has a positive mammogram. What is the chance that she really has cancer? 10 100 8694 9900 % (Type an integer or decimal rounded to the nearest tenth as needed.) c. Suppose a patient has a negative mammogram. What is the chance that she actually does have cancer? Total 1296 8704 10,000
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%).
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?
When you hear thw words “population” and “sample,” what comes first in your mind?
A researcher wishes to estimate the number of households with two computers. How large a sample is needed in order to be 90% confident that the sample proportion will not differ from the true proportion by more than 6%? A previous study indicates that the proportion of households with two computers is 23%. Group of answer choices
A programmer plans to develop a new software system. In planning for the operating system that he will use, hee needs to estimate the percentage of computers that use a new operating system. How many computers must be surveryed in order to be 90% confident that his estimate is in error by no more than one percentage point. Complete part (a) through (c) below. a. n= b Assummer that a recent survey suggests that about 86% of computers use a new operating system. c. Does the additional survey information from part (b) have much of an effect on the sample size that is required?
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 (reasonable) error that the poll can have. For example, a poll result of 72% with a margin of error of 4% indicates that p is most likely between 68% and 76% In a made up poll, the proportion of people who like dark chocolate more than milk chocolate was 39% with a margin of error of 2.2%. Describe the conclusion about p using an absolute value equality. I came up with .368 <= p <= .412 but I don't think it's right, please show steps so I can see where I went wrong!
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.
A polling company reported that 19% of 1018 surveyed adults said that secondhand smoke is "quite annoying." Complete parts (a) through (d) below. a. What is the exact value that is 19% of 1018? The exact value is. (Type an integer or a decimal.)

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