Exam (elaborations)
WPC 300 FINAL EXAM questions well answered to pass
- Course
- Institution
WPC 300 FINAL EXAM questions well answered to pass
[Show more]
Content preview
WPC 300 FINAL EXAM questions wellanswered to pass
Which of the following describes the standard deviation? - correct answer ✔✔It is the square root of the
variance.
When two variables are highly positively correlated, the correlation coefficient will be _______. - correct
answer ✔✔close to 1
According to statistical notation, what does ∑ stand for? - correct answer ✔✔to act as a summation
operator
The ________ is the observation that occurs most frequently. - correct answer ✔✔mode
The difference between the first and third quartiles is referred to as the ____________. - correct answer
✔✔interquartile range
Which of the following is an example of a measure of dispersion? - correct answer ✔✔variance
Which of the following describes a positively skewed histogram? - correct answer ✔✔a histogram that
tails off toward the right
Which of the following is true for a median? - correct answer ✔✔For an even number of observations,
the median is the mean of the two middle numbers
Which of the following is an example of a sample? - correct answer ✔✔The number of IT employees out
of all employees working in an office of Google
For a normal distribution mean is _______ to median. - correct answer ✔✔equal
When sample size increases
, Correct - correct answer ✔✔Confidence interval decreases
Which of the following proposition describes an existing theory or belief? - correct answer ✔✔Null
hypothesis
Which of the following is a Type-I error? - correct answer ✔✔The null hypothesis is actually true, but the
hypothesis test incorrectly rejects it.
In order to reject the null hypothesis, the p-value must be less than the - correct answer ✔✔Alpha
What is the confidence interval when the level of significance is 0.07? - correct answer ✔✔0.930
The WPC Sports Company has noted that the size of individual "customer order" is normally distributed
with a mean of $100 and standard deviation of $12. If a soccer team of 16 players were to make the next
batch of orders, what would be the standard error of the mean? - correct answer ✔✔3.00
You are collecting data via an online survey to improve education standard at ASU. Which of the
following methods will not result in data collection bias? - correct answer ✔✔Anonymously data
collection by hiding ASU brand in the survey question.
The central limit theorem states that if the population is normally distributed, then the - correct answer
✔✔Sampling distribution of the mean will also be normal for any sample size
Which of the following is a continuous random variable? - correct answer ✔✔The time to complete a
specific task
Which of the following is a difference between the t-distribution and the standard normal (z)
distribution? - correct answer ✔✔The t-distribution has a larger variance than the standard normal
distribution.
In classification analysis, we typically split the data into two mutually exclusive sets, known as ________,
to investigate the strength of the developed model. - correct answer ✔✔Training and validation/testing
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 BravelRadon. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now