INET RN HESI EXIT V5 LATEST VERSION / RN HESI INET
EXIT V5 ACTUAL EXAM REAL 160 EXAM QUESTIONS
AND CORRECT VERIFIED ANSWERS ALREADY GRADED
A+ (BRAND NEW !!)
What is the purpose of a dimenstionality constant?
- understand if enough data is available for a model
- all of these answers
- calculate accuracy of a model
- determine the probability distribution for a data set - ANSWER: Understand if
enough data is available for a model
Which method(s) can be used to decide which distribution fits a data set?
- all of these answers
- run a test for goodness of fit that compares the actual data to a distribution
- compare a histogram of actual data to a distribution
- compute the moments of the actual data distribution and examine them for a fit to
a distribution - ANSWER: all of these answers
Which of the following is a discrete random variable?
- annual number of sweepstakes winners from New York City
- all the above
- average height of a randomly selected group of boys
- distance between two locations - ANSWER: - annual number of sweepstakes
Given a five-point summary where: minimum=10, Q1 = 80, median=100,Q3=500, and
maximum=700. What would be a possible interpretation of this summary?
- data is uniform
- the median has roughly the same value as the mean
- data is skewed
- data roughly fits a Gaussian distribution - ANSWER: - data is skewed
1% of people have a certain genetic defect. 90% of tests for the gene detect the
defect (true positives). 9.6% of the tests are false positives. If a person gets a positive
test result, what are the odds they actually have the genetic defect?
- 8.65%
- 10.40%
- 90.4%
- 91.35% - ANSWER: - 8.65%
As the size of a sample increases, the law of large numbers estimates the shape of
the distribution of sample means to approximate a Gaussian (T/F) - ANSWER: False
, Which term is defined as the continuous variable value at any given sample in the
sample space, which can be interpreted as providing relative likelihood that the
value of the random variable would equal that sample?
- cumulative distribution function
- expected value
- probability density function
- variance - ANSWER: - probability density function
Which distribution should you consider for the best fit of continuous, symmetric data
when the data is not clustered around a central value?
- lognormal
- Poisson
- Geometric
- Uniform or Multi-modal - ANSWER: - Uniform or Multi-modal
Correlation implies causation; that is, correlation between two variables implies that
one causes the other. (T/F) - ANSWER: False
What is the true positive rate (also known as sensitivity or recall) fr the following
contingency table?
Context: we are trying to predict who has heart disease based on if they smoke or
not. (https://canvas.umn.edu/courses/262279/files/21880935/preview)
- (a+c)/(a+b+c+d)
- a/(a+b)
- a/(a+c)
- (a+b)/(a+c) - ANSWER: - a/(a+c)
Which p value supports this statement:
The test found that the data sample failed to reject the null hypothesis at a 5%
significance level.
- 0.03
- 0.07
- 0.005
- 0.01 - ANSWER: - 0.07
The curse of dimensionality applies to the challenge to perform meaningful
mathematics when the number of features, p, is much greater than the number of
samples, n, i.e. in the limit p>>n (T/F) - ANSWER: - True
A z-test is used when the population parameters (mean and standard deviation) are
known. (T/F) - ANSWER: - True
Which is worse? Type 1 or Type 2 error?
- Type 1
- Type 2
- It depends - ANSWER: - It depends
EXIT V5 ACTUAL EXAM REAL 160 EXAM QUESTIONS
AND CORRECT VERIFIED ANSWERS ALREADY GRADED
A+ (BRAND NEW !!)
What is the purpose of a dimenstionality constant?
- understand if enough data is available for a model
- all of these answers
- calculate accuracy of a model
- determine the probability distribution for a data set - ANSWER: Understand if
enough data is available for a model
Which method(s) can be used to decide which distribution fits a data set?
- all of these answers
- run a test for goodness of fit that compares the actual data to a distribution
- compare a histogram of actual data to a distribution
- compute the moments of the actual data distribution and examine them for a fit to
a distribution - ANSWER: all of these answers
Which of the following is a discrete random variable?
- annual number of sweepstakes winners from New York City
- all the above
- average height of a randomly selected group of boys
- distance between two locations - ANSWER: - annual number of sweepstakes
Given a five-point summary where: minimum=10, Q1 = 80, median=100,Q3=500, and
maximum=700. What would be a possible interpretation of this summary?
- data is uniform
- the median has roughly the same value as the mean
- data is skewed
- data roughly fits a Gaussian distribution - ANSWER: - data is skewed
1% of people have a certain genetic defect. 90% of tests for the gene detect the
defect (true positives). 9.6% of the tests are false positives. If a person gets a positive
test result, what are the odds they actually have the genetic defect?
- 8.65%
- 10.40%
- 90.4%
- 91.35% - ANSWER: - 8.65%
As the size of a sample increases, the law of large numbers estimates the shape of
the distribution of sample means to approximate a Gaussian (T/F) - ANSWER: False
, Which term is defined as the continuous variable value at any given sample in the
sample space, which can be interpreted as providing relative likelihood that the
value of the random variable would equal that sample?
- cumulative distribution function
- expected value
- probability density function
- variance - ANSWER: - probability density function
Which distribution should you consider for the best fit of continuous, symmetric data
when the data is not clustered around a central value?
- lognormal
- Poisson
- Geometric
- Uniform or Multi-modal - ANSWER: - Uniform or Multi-modal
Correlation implies causation; that is, correlation between two variables implies that
one causes the other. (T/F) - ANSWER: False
What is the true positive rate (also known as sensitivity or recall) fr the following
contingency table?
Context: we are trying to predict who has heart disease based on if they smoke or
not. (https://canvas.umn.edu/courses/262279/files/21880935/preview)
- (a+c)/(a+b+c+d)
- a/(a+b)
- a/(a+c)
- (a+b)/(a+c) - ANSWER: - a/(a+c)
Which p value supports this statement:
The test found that the data sample failed to reject the null hypothesis at a 5%
significance level.
- 0.03
- 0.07
- 0.005
- 0.01 - ANSWER: - 0.07
The curse of dimensionality applies to the challenge to perform meaningful
mathematics when the number of features, p, is much greater than the number of
samples, n, i.e. in the limit p>>n (T/F) - ANSWER: - True
A z-test is used when the population parameters (mean and standard deviation) are
known. (T/F) - ANSWER: - True
Which is worse? Type 1 or Type 2 error?
- Type 1
- Type 2
- It depends - ANSWER: - It depends
