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Statistics 101 Cognitive class Exam Answer:-

Course Name:- Statistics 101

Module 1:- Welcome to statistics

Question  1. Which one of the following is not an example of statistics?

  • The sweet smell of success
  • Monthly housing prices in a city
  • Traffic noise at a busy intersection
  • Annual unemployment rate in a country

Question 2.Which of the following statements is true? One can estimate the votes for a presidential candidate in a forthcoming election by:

  • Asking your barber
  • Conducting a poll of a random sample of the voting age population
  • Asking your favourite university professor about who is going to win
  • Asking the cab drivers in a city of their vote preference

Question 3.Which of the following is not a type of data visualization? (Pick the most appropriate answer)

  • An organization chart
  • A pie chart
  • A time series plot
  • A bar chart

  Module 2:-Descriptive statistics

 Question 1. Which of the following is not a cross-sectional data set?

  • Monthly survey of consumer confidence
  • National Census conducted every 5 or 10 years
  • Weekly data on average temperature
  • A survey of student satisfaction conducted at the end of the course

Question 2.Which of the following is an example of time series data?

  • Number of dolphins in the Pacific Ocean
  • Average batting average of a baseball player
  • Number of trees in Jardin du Luxemburg in Paris
  • Annual average housing price in New Yorku

Question 3.Which of the following is an example of multivariate data?

  • Vital signs recorded for a new born baby
  • Number of songs played in a day by your favourite radio station
  • Daily temperature recorded by a monitoring station in Antarctica
  • Number of words spoken by President Donald Trump in his inaugural speech

Module 3 :- Advance Descriptive statistics

Question 1.What is a suitable way to display the average income earned by men and women in a city?

  • A scatter plot
  • A pie chart
  • A histogram
  • A bar chart

Question 2.What is a suitable way to display relationship between two continuous variables?

  • A scatter plot
  • A pie chart
  • A histogram
  • A bar chart

Question 3.What’s the best way to display median and outliers?

  • A bubble chart
  • A time series plot
  • A box plot
  • A scatter plot

Module 4. Visualization

Question 1.What is the best way to display daily temperature for a city?

  • A histogram
  • A pie chart
  • A Box plot
  • A line plot

Question 2.What extra step is needed to display two related time series variables that differ greatly in magnitude?

  • Use two axes to display the lines
  • Plot them by colouring the lines with different colours
  • Plot the lines with different thickness
  • Plot them separately in two charts

Question 3.When the sum of two or more categories equals 100, what chart type is ideally suited for displaying data?

  • A line chart
  • A pie chart
  • A box plot
  • A histogram

Module 5:-from start to finish: Beauti pays data

Question 1.When using sample data with weights, it is important to compute statistics by:

  • Filtering the data with the weight variable
  • Weighting the data with the appropriate variable
  • Ignoring the weights                                  
  • None of the above

Question 2.When multiple observations are reported for each respondent in the data set, to compute statistics for variables about the respondents, one must:

  • Ignore the presence of duplicates and compute statistics as usual
  • Weight data by duplicates
  • Remove duplicates before running analysis
  • None of the above

Question 3.To be able to trace one’s steps, one must:

  • Generate and record syntax for every command executed for the analysis
  • Note steps taken for the analyses in a notebook
  • Use mouse for point and click to undertake the analysis
  • None of the above

Statistics 101 Cognitive class final Exam Answers:-

Question 1.  What is meta data?

  • Data about metal fatigue
  • The metabolism data in a clinical trial
  • The data about metamorphism
  • It’s the data about data

Question 2. Which of the following is not an example of big data?

  • Number of photographs uploaded to the internet every day
  • The emails sent daily from your email provider
  • The number of big basketball players in NBA (National Basketball Association)
  • Weekly data about individual credit card transactions registered for your local credit card company

Question 3. SPSS is ideally suited to analyze data stored in:

  • Books as words and paragraphs
  • Digital video files of Hollywood movies
  • Tables as rows and columns
  • Digital audio files of music records

Question 4. Reproducibility in statistical analysis requires one to use statistical software that supports:

  • Free usage for analysis
  • Syntax (script) based analysis
  • Tabular output of results
  • A point and click environment

Question 5. Which of the following is an example of categorical data?

  • Number of fire hydrants in a city
  • Number of children at a kindergarten
  • Length of the river Nile
  • Mode of travel to work

Question 6. Which of the following is not an example of ordinal data?

  • Ranking of athletes in an Olympic competition
  • Number of trees in a park
  • Level of happiness on a scale of 1 to 5
  • Street numbers

Question 7. Which of the following is an example of interval data?

  • The ethnicity of a person
  • “None”, “Some”, “Frequent” – representing the frequency of exercise
  • First, second and third rankings in a sports competition
  • Weight

Question 8. For a survey of student satisfaction in a course, the population comprises:

  • All students enrolled in the course
  • All male students registered in the department
  • All A+ students enrolled in the course
  • All students registered at the university

Question 9. A mean is meaningful for the following type of data

  • Audio data
  • Ordinal data
  • Ratio data
  • Categorical data

Question 10. Median represents a value in the data set where:

  • Half of the observations are above the median and the other half below it
  • Most observations are negative
  • Half of the observations are known and the other half not known
  • Most observations are positive

Question 11. If the standard deviation of a variable is larger than the mean, the variable depicts:

  • Fluidity
  • Low variance
  • Smoothness
  • High variance

Question 12. A histogram is a graphical display of how a variable is

  • Observed
  • Displayed
  • Distributed
  • Recorded

Question 13. The following type of computation is suited for categorical data:

  • Proportions
  • Standard deviations
  • Histogram
  • Averages

Question 14. The relationship between two categorical variables can be captured by:

  • Standard deviation
  • A crosstabulation
  • A bar chart
  • A histogram

Question 15. The probability of getting a 2 by rolling TWO six-sided dice (with sides labeled as 1, 2, 3, 4, 5, 6) is

  • 1/36
  • 1/18
  • 2
  • 2/36

Question 16. What is the best way to determine the significance of relationship between two categorical variables?

  • A regression model
  • A Pearson Correlation test
  • A Chi-square test
  • A t-test

Question 17.If two continuous variables are positively correlated, their scatter plot will depict:

  • A flat line
  • A downward sloping curve
  • An upward sloping curve
  • None of the above

Question 18.What is the best way to determine the significance of relationship between two continuous variables?

  • A regression model
  • A Pearson Correlation test
  • A Chi-square test
  • A t-test

Question 19.A good chart should not be missing the following:

  • A self-explanatory variable title
  • Thick borders
  • A dark background colour
  • Bright colours

Question 20. What is the best practice to display axes labels?

  • Use self-explanatory variables
  • Use variable names
  • Use bold font to highlight labels
  • Don’t use any labels

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