Exercise How many children will be needed in the survey to determine the level of dental health among public elementary school children in Community X, if the researcher would like that his estimate to be within 10% of the true value with a reliability level of 99%, if previous research shows a standard deviation of the dental caries score is 5?5? Exercise 4A medical representative wanted to know how many of theircustomers bought an item from them after viewing their website on acertain day. Given that their website has on average 10,000 views perday, determine the sample size of the customers that they have tomonitor at a 95% confidence level with a 5% margin of error if:They are uncertain of the current conversion rate.They know from previous surveys that the conversion rate is 5%. Exercise 2• How many children will be needed in the survey to determine the levelof dental health among public elementary school children in CommunityX, if the researcher would like that his estimate to be within 10% of thetrue value with a reliability level of 99%, if previous research shows astandard deviation of the dental caries score is 1.5?

Given: Margin of error(E)=10%Standard deviation (σ)=5Confidence level=99%

Answered: How many children will be needed in the…

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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How many children will be needed in the survey to determine the level of dental health among public elementary school children in Community X, if the researcher would like that his estimate to be within 10% of the true value with a reliability level of 99%, if previous research shows a standard deviation of the dental caries score is

5?5?

Exercise 4
A medical representative wanted to know how many of their
customers bought an item from them after viewing their website on a
certain day. Given that their website has on average 10,000 views per
day, determine the sample size of the customers that they have to
monitor at a 95% confidence level with a 5% margin of error if:
They are uncertain of the current conversion rate.
They know from previous surveys that the conversion rate is 5%.

Exercise 2
• How many children will be needed in the survey to determine the level
of dental health among public elementary school children in Community
X, if the researcher would like that his estimate to be within 10% of the
true value with a reliability level of 99%, if previous research shows a
standard deviation of the dental caries score is 1.5?

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