Predictive analytics - quiz 1-basics

Calculating mean or variance is a part of

• Descriptive statistics

• Inferential statistics

Which of the following is NOT used in any data analytics?

• Past data

• Future data

• Current data

Predictive analytics shall be well explained as

• likelihood of future outcomes based on historical data

• Identifying patterns present in data

• Visualizing data in meaningful way

• Presenting data as a summary

What is the denominator value in the formula for finding the covariance between two variables?

• n-1

• n

• n-2

• n+1

When is the paired t-test used?

• whether there are any statistically significant differences between the means of two groups

• used for testing relationships between categorical variables

• when we are interested in the difference between two variables for the same subject

• whether there are any statistically significant differences between the means of two or more independent groups