STATISTICS AND PROBABILITY

LESSON 1 - RANDOM VARIABLES (DISCRETE AND CONTINUOUS)

A. Directions: Write D if the statement represents a discrete random variable or C if it represents a continuous random variable.

_____1. the number of students randomly selected to be interviewed by a researcher

_____2. the weight in kilograms of randomly selected students

_____3. the hourly temperature last Sunday

_____4. the number of left-handed teachers randomly selected in a faculty room

_____5. the height of daisy plants in the backyard

B. Directions: Write allthe possible values of each random variable as described. A sample is

given below:

X: Number of female among six students

Answer: X = { 0, 1, 2, 3, 4, 5, 6 }

1. X: Number of odd number outcomes in a roll of a die

_________________________________________

2. Y: Weight (in mg) of a powder that does not exceed 80 mg

___________________________________________

3. X: Number of heads in 4 flips of a coin

___________________________________________

4. Y: Length (in cm) of a shoelace that is not longer than 2 meters

___________________________________________

5. X: Scores of a student in a 10-item test

___________________________________________

LESSON 2 - PROBABILITY DISTRIBUTION AND ITS PROPERTIES (Part 1)

Directions: Determine whether the distribution represents a probability distribution. Explain your answer.

\f