A national health organization says that 30% of teenagers have tried smoking cigarettes. A health agency in a small city decides to see if this proportion holds true for its own city. The city has a total of 3500 teenagers. The health agency randomly selects 280 teenagers, and finds that 56 of them have smoked cigarettes. What is the sample proportion? Group of answer choices .016 .536 .08 .2 You want to make a 99% confidence interval for the proportion of teenagers in the city who have smoked. What critical value Z* would you use? Group of answer choices 1.28 1.645 1.96 2.58 When making a confidence interval, what is the Standard Error that you use? (round to 4 places after the decimal)
A national health organization says that 30% of teenagers have tried smoking cigarettes. A health agency in a small city decides to see if this proportion holds true for its own city. The city has a total of 3500 teenagers. The health agency randomly selects 280 teenagers, and finds that 56 of them have smoked cigarettes. What is the sample proportion? Group of answer choices .016 .536 .08 .2 You want to make a 99% confidence interval for the proportion of teenagers in the city who have smoked. What critical value Z* would you use? Group of answer choices 1.28 1.645 1.96 2.58 When making a confidence interval, what is the Standard Error that you use? (round to 4 places after the decimal)
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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A national health organization says that 30% of teenagers have tried smoking cigarettes. A health agency in a small city decides to see if this proportion holds true for its own city.
The city has a total of 3500 teenagers. The health agency randomly selects 280 teenagers, and finds that 56 of them have smoked cigarettes.
What is the sample proportion?
Group of answer choices
.016
.536
.08
.2
You want to make a 99% confidence interval for the proportion of teenagers in the city who have smoked. What critical value Z* would you use?
Group of answer choices
1.28
1.645
1.96
2.58
When making a confidence interval, what is the Standard Error that you use? (round to 4 places after the decimal)
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