Exam (elaborations)
MATH302 Quiz 5 | Questions and Answers Latest {} A+ Graded | 100% Verified
- Course
- Institution
MATH302 Quiz 5 | Questions and Answers Latest {} A+ Graded | 100% Verified
[Show more]
Content preview
MATH302 Quiz 5 | Questions and Answers Latest {2024- 2025} A+ Graded | 100% VerifiedSelect the correct answer for the blank: If everything else stays the same, the required sample size ____
as the confidence level increases to reach the same margin of error. - Increases
A random sample of college basketball players had an average height of 66.35 inches. Based on this
sample, (65.6, 67.1) found to be a 94% confidence interval for the population mean height of college
basketball players. Select the correct answer to interpret this interval. - We are 94% confident that the
population mean height of college basketball players is between 65.6 and 67.1 inches.
The population standard deviation for the height of college basketball players is 3.4 inches. If we want to
estimate 95% confidence interval for the population mean height of these players with a 0.5 margin of
error, how many randomly selected players must be surveyed? (Round up your answer to nearest whole
number) - a = (1-.95) = 0.05 = (0.05/2) = 0.025 = (1-0.025) = 0.975
Z-Critical Value = NORM.S.INV(0.975) = 1.96
SD = 3.4
ME = 0.5
n = (SD^2∗Z^2)/ME^2
n = (3.42^2∗1.96^2)/.5^2
n = 177.635584 = 178
There is no prior information about the proportion of Americans who support gun control in 2018. If we
want to estimate 92% confidence interval for the true proportion of Americans who support gun control
in 2018 with a 0.2 margin of error, how many randomly selected Americans must be surveyed? (Round
up your answer to nearest whole number) - a = (1-.92) = 0.08 = (0.08/2) = 0.04 = (1-0.04) = .96
, Z-Critical Value =NORM.S.INV(.96) = 1.750686
ME = 0.2
n = (p*q*Z^2)/ME^2
n = (0.5*0.5*1.750686^2)/0.2^2
N = 20
The population standard deviation for the height of college hockey players is 3.4 inches. If we want to
estimate 90% confidence interval for the population mean height of these players with a 0.6 margin of
error, how many randomly selected players must be surveyed? (Round up your answer to nearest whole
number) - a = (1-.90) = 0.1 = (0.1/2) = 0.05 = (1-0.05) = 0.95
Z-Critical Value = NORM.SINV(.95) = 1.645
SD = 3.4
ME = 0.6
n = (SD^2∗Z^2)/ME^2
n = (3.42^2∗1.645^2)/0.6^2
n = 86.8934694 = 87
The population standard deviation for the height of college baseball players is 3.2 inches. If we want to
estimate 90% confidence interval for the population mean height of these players with a 0.7 margin of
error, how many randomly selected players must be surveyed? (Round up your answer to nearest whole
number) - a = (1-.90) = 0.1 = (0.1/2) = 0.05 = (1-0.05) = 0.95
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller oneclass. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.48. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78600 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now