Unit 5 - Data Analysis Assessment

1. What is the purpose of filtering data in data analysis?

• To remove outliers from the dataset
• To remove irrelevant data from the dataset
• To sort data in ascending order
• To calculate statistical measures

2. Which of the following is NOT a method for cleaning data?

• Removing duplicates
• Handling missing values
• Replacing outliers with average values
• Sorting data in descending order

3. Which type of chart is best for displaying categorical data?

• Histogram
• Bar chart
• Line graph
• Scatter plot

4. What does a uniform bar chart indicate?

• The data is evenly distributed
• The data is skewed to one side
• There are outliers in the data
• The data is missing values

5. How can you determine the most common values in a bar chart?

• Looking for the tallest bars
• Calculating the mean of the data
• Counting the number of data points
• Finding the median of the data

6. What does a cross tab analysis involve?

• Analyzing the correlation between two variables
• Combining data from different datasets
• Identifying outliers in a dataset
• Sorting data in alphabetical order

7. Which of the following is an example of quantitative data?

• Gender
• Favorite color
• Age
• Marital status

8. In a bar chart, what does the height of each bar represent?

• The frequency of each category
• The probability of each category occurring
• The range of each category
• The standard deviation of each category

9. How can you determine if a bar chart is uniform or not?

• By visually inspecting the chart
• By calculating the mode of the data
• By comparing the frequencies of each category
• By calculating the standard deviation of the data

10. What can you infer from a histogram with a bell-shaped curve?

• The data is normally distributed
• The data is uniformly distributed
• There are outliers in the data
• The data is missing values