HVBS - Day 2 Assessment

What is the main purpose of Exploratory Data Analysis (EDA)?

• To summarize the main characteristics of data sets

• To generate research questions

• To conduct hypothesis testing

• To perform formal modeling

Which statistical measure is often used for categorical data?

• Standard Deviation

• Mean

• Mode

• Variance

What type of chart is used to display data points connected by straight lines?

• Line Chart

• Bar Chart

• Histogram

• Pie Chart

How can outliers be identified in a dataset using SPSS?

• By using scatter plots

• By generating bar charts

• By examining z-scores

• By calculating skewness

What symbol represents missing values in SPSS?

• Comma (,)

• Period (.)

• Asterisk (*)

• Question mark (?)

Which test is used to assess the equality of variances across groups?

• Kolmogorov-Smirnov Test

• Shapiro-Wilk Test

• Barlett's Test

• Levene's Test

Which type of chart is used to present the 'whole' into parts?

• Line Chart

• Pie Chart

• Histogram

• Bar Chart

What is the purpose of generating a histogram in data analysis?

• To illustrate numerical proportions

• To display the distribution of numerical data

• To compare discrete categories

• To visualize the relationship between two variables

What is the purpose of a scatter plot in data analysis?

• To display the distribution of numerical data

• To show the relationship between two variables

• To compare discrete categories

• To visualize numerical proportions

How can skewness be calculated for a dataset?

• By using scatter plots

• By generating boxplots

• By examining z-scores

• By analyzing the shape of the data distribution