C207 Modules 1, 2, 3, 4 and 5 Exam
Questions and Answers
Middle Score for a set of data - Answer-Median
Tells us the number of standard deviations a data point is from the mean - Answer-Z
score
If the average is the same for two groups, what will determine their differences? -
Answer-Variance
The spread of data in a sample. How far the data points are from the mean - Answer-
Standard deviation
Measure of central Tendency that is influenced by the size of the values in a dataset -
Answer-Mean
Each of the 4 quartile groups a population can be divided - Answer-Quartiles
Measures the difference between the 3rd and 1st quartile - Answer-Inter quartile range
iqr
Used to study the composition of a data set and examine the distribution - Answer-Box
plot
There are 6 toll booths to enter the highway. What probability does each to tollbooth
worker have of getting the customer? - Answer-One customer and 6 booths = 1/6 or
16.7%
The order you pick you sample in does not matter - Answer-Combination
When given PA given PB you can use this to find the PB given PA - Answer-Bayes
theorem
Apply this rule when looking for to events occurring (and) - Answer-Multiplication
Yes this rule when looking for one or the other event happening (or) - Answer-Addition
A technique for minimizing total costs or maximizing profit based on constraints -
Answer-Linear programming
A technique using more than one independent variable to predict a single dependent
variable - Answer-Multiple regression
, A technique using one independent variable to predict a single dependent variable -
Answer-Linear regression
Measures the strength of a linear relationship - Answer-Correlation coefficient
Measures the goodness of fit and a regression analysis's - Answer-R²
A simple regression using time as the independent variable - Answer-Time series
A general s**** upward or downward over a period of time - Answer-Trend
Unforeseen circumstances causing random deviations - Answer-Irregularities
Repetition in up-and-down patterns - Answer-Cyclicality
Regular pattern within a single year - Answer-Seasonality
Represents the probability that a variable falls within a certain range - Answer-
Cumulative distribution
Z score for 99 percent level of confidence - Answer-2.576
Z score for 95% level of confidence - Answer-1.960
Measures of central tendency are approximately equal (mean and median) - Answer-
Normal distribution
Used to compare the mean of 3 or more groups - Answer-A Nova
A general soup upward or downward over a period of time - Answer-Trend
A Nova uses this test statistics - Answer-F value
A correlation is weak if the coefficient is close To - Answer-0
A correlation is strong if the coefficient is close to - Answer-One or negative 1
Model of designing analyzing and scoring tests - Answer-Item response theory IRT
How does the government different than the private sector in a cost benefit analysis's -
Answer-Government benefits aren't always money
Compares on individuals performance to other individuals - Answer-norm referenced
Used to analyze if funding is worth the outcome of a project - Answer-Cost benefit
analysis's
Questions and Answers
Middle Score for a set of data - Answer-Median
Tells us the number of standard deviations a data point is from the mean - Answer-Z
score
If the average is the same for two groups, what will determine their differences? -
Answer-Variance
The spread of data in a sample. How far the data points are from the mean - Answer-
Standard deviation
Measure of central Tendency that is influenced by the size of the values in a dataset -
Answer-Mean
Each of the 4 quartile groups a population can be divided - Answer-Quartiles
Measures the difference between the 3rd and 1st quartile - Answer-Inter quartile range
iqr
Used to study the composition of a data set and examine the distribution - Answer-Box
plot
There are 6 toll booths to enter the highway. What probability does each to tollbooth
worker have of getting the customer? - Answer-One customer and 6 booths = 1/6 or
16.7%
The order you pick you sample in does not matter - Answer-Combination
When given PA given PB you can use this to find the PB given PA - Answer-Bayes
theorem
Apply this rule when looking for to events occurring (and) - Answer-Multiplication
Yes this rule when looking for one or the other event happening (or) - Answer-Addition
A technique for minimizing total costs or maximizing profit based on constraints -
Answer-Linear programming
A technique using more than one independent variable to predict a single dependent
variable - Answer-Multiple regression
, A technique using one independent variable to predict a single dependent variable -
Answer-Linear regression
Measures the strength of a linear relationship - Answer-Correlation coefficient
Measures the goodness of fit and a regression analysis's - Answer-R²
A simple regression using time as the independent variable - Answer-Time series
A general s**** upward or downward over a period of time - Answer-Trend
Unforeseen circumstances causing random deviations - Answer-Irregularities
Repetition in up-and-down patterns - Answer-Cyclicality
Regular pattern within a single year - Answer-Seasonality
Represents the probability that a variable falls within a certain range - Answer-
Cumulative distribution
Z score for 99 percent level of confidence - Answer-2.576
Z score for 95% level of confidence - Answer-1.960
Measures of central tendency are approximately equal (mean and median) - Answer-
Normal distribution
Used to compare the mean of 3 or more groups - Answer-A Nova
A general soup upward or downward over a period of time - Answer-Trend
A Nova uses this test statistics - Answer-F value
A correlation is weak if the coefficient is close To - Answer-0
A correlation is strong if the coefficient is close to - Answer-One or negative 1
Model of designing analyzing and scoring tests - Answer-Item response theory IRT
How does the government different than the private sector in a cost benefit analysis's -
Answer-Government benefits aren't always money
Compares on individuals performance to other individuals - Answer-norm referenced
Used to analyze if funding is worth the outcome of a project - Answer-Cost benefit
analysis's
