Business Analytics Exam test
queries and answers graded A+
Which of the following statements is NOT true?
A) Dealing with uncertainty includes measuring uncertainty
B) Dealing with uncertainty includes modelling uncertainty
C) Dealing with uncertainty includes eliminating certainty by using normal prob. distribution -
ANS✅✅Dealing with uncertainty includes eliminating uncertainty by using the normal probability
distribution
Data Analysis Includes - ANS✅✅1.Data description
2.data inference
3.the search for relationships in data
Numerical Variables can be subdivided in which two types? - ANS✅✅Discrete and Continuous
Gender and State are examples of which type of data - ANS✅✅Categorical Data
A histogram that has a single peak and looks approximately the same to the left and right of the peak
is called: - ANS✅✅Symmetric
Which of the following are the two most commonly used measures of variability? -
ANS✅✅Variance and Standard Deviation
Suppose that a histogram of a data set is approximately symmetric and "bell shaped". Approximately
what
percent of the observations are within two standard deviations of the mean? - ANS✅✅95%
For a boxplot, the vertical line inside the box indicates the location of the - ANS✅✅median
A sample of 20 observations has a standard deviation of 4. The sum of the squared deviations from
the sample - ANS✅✅304
queries and answers graded A+
Which of the following statements is NOT true?
A) Dealing with uncertainty includes measuring uncertainty
B) Dealing with uncertainty includes modelling uncertainty
C) Dealing with uncertainty includes eliminating certainty by using normal prob. distribution -
ANS✅✅Dealing with uncertainty includes eliminating uncertainty by using the normal probability
distribution
Data Analysis Includes - ANS✅✅1.Data description
2.data inference
3.the search for relationships in data
Numerical Variables can be subdivided in which two types? - ANS✅✅Discrete and Continuous
Gender and State are examples of which type of data - ANS✅✅Categorical Data
A histogram that has a single peak and looks approximately the same to the left and right of the peak
is called: - ANS✅✅Symmetric
Which of the following are the two most commonly used measures of variability? -
ANS✅✅Variance and Standard Deviation
Suppose that a histogram of a data set is approximately symmetric and "bell shaped". Approximately
what
percent of the observations are within two standard deviations of the mean? - ANS✅✅95%
For a boxplot, the vertical line inside the box indicates the location of the - ANS✅✅median
A sample of 20 observations has a standard deviation of 4. The sum of the squared deviations from
the sample - ANS✅✅304
