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Write a function called is_identity that takes a list of lists representing a matrix of integers as its only argument and returns True if it is an identity matrix, False otherwise. Identity matrices have all ones on the diagonal, zeroes everywhere else. Examples:

This is continuous data.

Which of the following expressions evaluates to “Rocket”?

Use the above table to translate 0x477569646F into characters.

To get frequencies of discrete data, we count the number of times each value occurs.

If we have a Series s that has many data points in it, which of the following functions will return a list of all of the values in s that are greater than or equal to a passed in cutoff?

Given the following Python code: query = “INSERT INTO inventory VALUES (?, ?, ?, ?);” c.execute(query, row) What is the purpose of the question marks?

When we calculate the anomaly for a dataset by subtracting the mean of the data from every datapoint, we:

In dental imaging, the quality of the x-ray beam is controlled by:

If demand is perfectly elastic,