MSU STT 200 Exam 1 Questions
with Correct Answers
What is a Histogram? - Answer- A chart made of bars.
What is a Simple Random Sample? - Answer- Each object has an equal chance of
being selected.
What is Stratified Random Sampling? - Answer- Dividing data into strata and then
choosing randomly
What is Cluster Random Sampling? - Answer- Split the population into representative
clusters, pick a cluster at random, perform a census.
What is Multistage Random Sampling? - Answer- Using a variety of sampling methods.
What is Systematic Random Sampling? - Answer- Using a system to pick at random
Four Principles of Experiments - Answer- Control, Random, Replication,
Chebyshev's Theorem - Answer- - At least 3/4 of the values in a data set are within 2
standard deviations.
- At least 8/9 of the values in a data set are within 3 standard deviations.
- Unsure about distribution of data.
68-95-99 Rule - Answer- - 68% of values are within 1 standard deviation
- 95% of values are within 2 standard deviation
- 99% of values are within 3 standard deviations
- Symmetric, Unimodal distribution.
Three Data Context Questions - Answer- Who, What, Why
Three steps to doing data analysis - Answer- Think, Show, Tell
Categorical Variables - Answer- Variables that belong in categories. Example- eye
color, gender, major.
with Correct Answers
What is a Histogram? - Answer- A chart made of bars.
What is a Simple Random Sample? - Answer- Each object has an equal chance of
being selected.
What is Stratified Random Sampling? - Answer- Dividing data into strata and then
choosing randomly
What is Cluster Random Sampling? - Answer- Split the population into representative
clusters, pick a cluster at random, perform a census.
What is Multistage Random Sampling? - Answer- Using a variety of sampling methods.
What is Systematic Random Sampling? - Answer- Using a system to pick at random
Four Principles of Experiments - Answer- Control, Random, Replication,
Chebyshev's Theorem - Answer- - At least 3/4 of the values in a data set are within 2
standard deviations.
- At least 8/9 of the values in a data set are within 3 standard deviations.
- Unsure about distribution of data.
68-95-99 Rule - Answer- - 68% of values are within 1 standard deviation
- 95% of values are within 2 standard deviation
- 99% of values are within 3 standard deviations
- Symmetric, Unimodal distribution.
Three Data Context Questions - Answer- Who, What, Why
Three steps to doing data analysis - Answer- Think, Show, Tell
Categorical Variables - Answer- Variables that belong in categories. Example- eye
color, gender, major.
