Statistics ch 7 Exam Questions And Answers 100% Pass
2 views 0 purchase
Course
Statistics
Institution
Statistics
Statistics ch 7 Exam Questions And Answers
100% Pass
A single number that estimates the value of an unknown parameter is called a _ estimate -
answerPoint
The margin of error is the product of the standard error and the _ - answerCritical value
In the confidence interval 24.3 +- 1.2 the quanti...
Statistics ch 7 Exam Questions And Answers
100% Pass
A single number that estimates the value of an unknown parameter is called a _ estimate -
answer✔Point
The margin of error is the product of the standard error and the _ - answer✔Critical value
In the confidence interval 24.3 +- 1.2 the quantity 1.2 is called the _ - answer✔Margin of error
If we increase the confidence level and keep the sample size the same, we _ the margin of error
- answer✔Increase
The confidence level is the proportion of all possible samples for which the confidence interval
will cover the true values - answer✔True
To construct a confidence interval for a population mean, we add and subtract the critical value
from the point estimate - answer✔False, margin of error
Increasing the sample size while keeping the confidence level the same will result in a narrower
confidence interval - answer✔True
If a 95% confidence interval for a population mean is 1.7<U<2.4, then the probability is 0.95
that the mean is between 1.7 and 2.3 - answer✔False
When constructing a confidence interval for a population mean u from a sample of size 12, the
number of degrees of freedom for the critical value ta/2 is_ - answer✔11
When the number of degrees of freedom is large, the student's t distribution is close to _
distribution. - answer✔Normal
The student's t curve is less spread out than the standard normal curve. - answer✔False more
The student's t distribution should not be used to find a confidence interval for u if outliers are
presented in a small sample. - answer✔True
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 Thebright. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
