Exam 4: Introducing the Python Collections: Lists, Dictionaries, Tuples, and Statistics

Match each definition with its term. -Found by locating the item that occurs in the exact middle of a collection.

One of the most often used measures of a collection of data is known as:

Case Study 3: >>> ages = {'David':45, 'Brenda':46} >>> ages {'David': 45, 'Brenda': 46} >>> -Refer to the session in the accompanying Case Study 3. The reference ages refers to a list.

Case Study 2: >>> changeList = [1, 2, "buckle my shoe", 3, 4, "shut the door"] 2. >>> changeList 3. [1, 2, 'buckle my shoe', 3, 4, 'shut the door'] 4. >>> changeList[2] = "the sky is blue" 5. >>> changeList 6. ?????? 7. >>> name = "Monte" 8. >>> name[2] = "x" 9. ?????? -Refer to the session in the accompanying Case Study 2. What will be the output on line 9?

How is an empty list represented in Python?

Describe two characteristics of Python dictionaries.

Explain the meaning of the terms mutable and immutable.

Match each definition with its term. -The most frequently occurring value in a collection.

Match each definition with its term. -Calculated by adding up the values in a collection and dividing by the number of items.

What represents the value(s) that occur most often in a set of data?

The following Python statement creates a list of even numbers in ascending order: list(range(10, 2, -2))

How would you use Python to find the mean value in a list?

Case Study 3: >>> ages = {'David':45, 'Brenda':46} >>> ages {'David': 45, 'Brenda': 46} >>> -Refer to the session in the accompanying Case Study 3. What will be the output after the following statement? >>> ages['Kelsey'] = 19 >>> ages

How might you use Python to visualize a frequency distribution?

Match each definition with its term. -Measure of how spread out data values in a collection are.

How can Python be used to calculate dispersion?

Lists in Python are sequences.

A Python ____ is a collection of associated pairs of items where each pair consists of a key and a value.

How would you find the mode of a list in Python?

Define the concept of a list and describe some specific characteristics of lists in Python.