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STA 111 - Descriptive Statistics
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A box contains 4 red balls, 3 green balls, and 5 blue balls. What is the probability of randomly picking a red ball?
In a bag of 8 balls, 5 are blue and 3 are red. What is the probability of drawing two red balls without replacement?
A box contains 3 white, 2 black, and 5 yellow balls. If one ball is selected at random, what is the probability of picking a yellow ball?
A coin is flipped three times. What is the probability of getting exactly two heads?
For the grouped data, calculate the mean absolute deviation.
| Class Interval | Frequency |
| 0–10 | 5 |
| 10–20 | 7 |
| 20–30 | 8 |
Determine the mode for the data:
| Class Interval | Frequency |
| 0–10 | 6 |
| 10–20 | 12 |
| 20–30 | 10 |
Using the data below, calculate the mean for the class intervals and their frequencies:
| Class Interval | Frequency |
| 0–10 | 5 |
| 10–20 | 8 |
| 20–30 | 7 |
What is the primary purpose of an Ogive?
Given the frequency distribution, find the sample variance
| Class Interval | Frequency |
| 10–20 | 4 |
| 20–30 | 6 |
| 30–40 | 8 |
Which of the following is an example of primary data?