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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:

• Conducting a poll of a random sample of the voting age population
• 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?

• The metabolism data in a clinical trial
• 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 