Based on past data, it is known that about 20.5% of people smoke cigarettes. Suppose we take a sample of 100 people currently and find that only 12% smoke cigarettes. We want to see if there is evidence that the percentage of people who smoke cigarettes is decreasing. a. If I wanted to control my margin of error and set it to 3% with 99% confidence, what sample size would I need to take instead of the 100? b. Using my original sample size of 100, what would be the 99% confidence interval for the population proportion?

Based on past data, it is known that about 20.5% of people smoke cigarettes. Suppose we take a sample of 100 people currently and find that only 12% smoke cigarettes. We want to see if there is evidence that the percentage of people who smoke cigarettes is decreasing. a. If I wanted to control my margin of error and set it to 3% with 99% confidence, what sample size would I need to take instead of the 100? b. Using my original sample size of 100, what would be the 99% confidence interval for the population proportion?

Name: Please Answer E-G and include FOUR decimal places! thank you 2. Based
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Description: Please Answer E-G and include FOUR decimal places! thank you 2. Based on past data, it is known that about 20.5% of people smoke cigarettes. Suppose we take a sample of 100people currently and find that only 12% smoke cigarettes. We want to see if th

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Percentage

A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.

Algebraic Expressions

In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.

Numbers

Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.

Subtraction

Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.

Addition

Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.

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Question

Please Answer E-G and include FOUR decimal places! thank you

2. Based on past data, it is known that about 20.5% of people smoke cigarettes. Suppose we take a sample of 100
people currently and find that only 12% smoke cigarettes. We want to see if there is evidence that the
percentage of people who smoke cigarettes is decreasing.
a. If I wanted to control my margin of error and set it to 3% with 99% confidence, what sample size would I
need to take instead of the 100?
b. Using my original sample size of 100, what would be the 99% confidence interval for the population
proportion?
c. What are the null and alternative hypotheses?
d. What is the critical value at 99% confidence?
e. Calculate the test statistic (using the sample of 100).
f. Find the p-value.
g. What conclusion would be made here at the 99% confidence level?

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