According to previous studies, 10% of the U.S. population is left-handed. Not knowing this, a high school student claims that the percentage of left-handedpeople in the U.S. is 12%.The student is going to take a random sample of 900 people in the U.S. to try to gather evidence to support the claim. Let p be the proportion of left-handedpeople in the sample.Answer the following. (If necessary, consult a list of formulas.)(a) Find the mean of p.(b) Find the standard deviation of p.(c) Compute an approximation for P (p ≥0.12), which is the probability that there will be 12% or more left-handed peoplein the sample. Round your answer to four decimal places.G

Given information: The true population proportion is p=0.10. The sample proportion is denoted by p^.…

Answered: According to previous studies, 10% of…

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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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 48% with a margin of error of 1.9%. Describe the conclusion about p using an absolute value inequality.
A sample of Reese's pieces contains the following: 23 Orange, 14 Brown, 18 Yellow. What is the proportion of orange? Round to two places
. A Pew poll taken in 2010 surveyed 830 people aged 18-29 and found that 166 of them had one or more tattoos. Based on this survey, can you conclude that the percentage of people aged 18-29 who have a tattoo is less than 25%? Use the a = significance. 0.01 level of
In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation in statistical polling is the margin or error- the largest (reasonable) 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 44% with a margin of error of 1.3%. Describe the conclusion about p using an absolute value inequality.
if the 90% Ci for the population mean is (-1, 4.4) what is the sample mean a. can't be found b. 2.7 c. 5,40 d. 1.7
A researcher wants to determine the percentage of American teenagers who send or receive text messages while doing homework. Which of the following techniques would likely be the MOST efficient way of obtaining an accurate estimate for this percentage? 1. Randomly select teenagers from the list of all teenage students in every state in America and mail surveys to those teens, asking them if they send or receive text messages while doing homework. 2. Send a survey to every teenager in America and ask them if they send or receive text messages while doing homework. 3. Randomly select teenagers from the list of all teenage students in one state and mail surveys to those teens, asking them if they send or receive text messages while doing homework.
In October, the campus bookstore asked a random set of freshmen and seniors how much they had spent on textbooks that semester. The bookstore believes that the two groups spent the same amount. What is an appropriate test value for a z test?
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 39% with a margin of error of 1.3%. Describe the conclusion about p using an absolute value inequality. 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 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%).
Suppose a community college has 10,000 students (the population). We are interested in the average amount of money a part-time student spends on books in the fall term. Asking all 10,000 students is almost an impossible task. A sample is taken using a list of students who take photography classes, and each of these students is surveyed. Do you think that this sample is representative of the entire 10,000 student population? Why or why not?

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