### Statistical Probability Exercises#### Exercise 11- **Objective:** Let sample size $ n = 20 $. Find $ P(t > 2.80) $. - **Options:** a. $ 0.0005 < P(t > 2.80) < 0.001 $ b. $ 0.001 < P(t > 2.80) < 0.0025 $ c. $ 0.0025 < P(t > 2.80) < 0.005 $ d. $ 0.005 < P(t > 2.80) < 0.01 $#### Exercise 12- **Objective:** Let sample size $ n = 20 $. Find $ P(t < -2.80) $. - **Options:** a. $ 0.0005 < P(t < -2.80) < 0.001 $ b. $ 0.001 < P(t < -2.80) < 0.0025 $ c. $ 0.0025 < P(t < -2.80) < 0.005 $ d. $ 0.005 < P(t < -2.80) < 0.01 $#### Exercise 13- **Objective:** Let sample size $ n = 20 $. Find $ P(t < -2.80) + P(t > 2.80) $ (i.e., the sum of the two tails). - **Options:** a. $ 0.001 < $ sum of the two tails $ < 0.002 $ b. $ 0.002 < $ sum of the two tails $ < 0.005 $ c. $ 0.005 < $ sum of the two tails $ < 0.01 $ d. $ 0.01 < $ sum of the two tails $ < 0.02 $#### Exercise 14- **Objective:** Let sample size $ n = 78 $. Find $ P(t < -3.33) $. **Hint:** Use the closest degree of freedom, which is $ df = 80 $. Also, since each $ t $ density curve is symmetric, \( P(t <

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11. Let sample size n = 20. Find P (t > 2.80). a. 0.0005 < Find P (t > 2.80) < 0.001 b. 0.001 2.80) < 0.0025 c. 0.0025 < Find P (t > 2.80) <0.005 d. 0.005 < Find P (t > 2.80) <0.01

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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Concept explainers

Compound Probability

Compound probability can be defined as the probability of the two events which are independent. It can be defined as the multiplication of the probability of two events that are not dependent.

Tree diagram

Probability theory is a branch of mathematics that deals with the subject of probability. Although there are many different concepts of probability, probability theory expresses the definition mathematically through a series of axioms. Usually, these axioms express probability in terms of a probability space, which assigns a measure with values ranging from 0 to 1 to a set of outcomes known as the sample space. An event is a subset of these outcomes that is described.

Conditional Probability

By definition, the term probability is expressed as a part of mathematics where the chance of an event that may either occur or not is evaluated and expressed in numerical terms. The range of the value within which probability can be expressed is between 0 and 1. The higher the chance of an event occurring, the closer is its value to be 1. If the probability of an event is 1, it means that the event will happen under all considered circumstances. Similarly, if the probability is exactly 0, then no matter the situation, the event will never occur.

Question

### Statistical Probability Exercises

#### Exercise 11
- **Objective:** Let sample size $ n = 20 $. Find $ P(t > 2.80) $.
- **Options:**
a. $ 0.0005 < P(t > 2.80) < 0.001 $
b. $ 0.001 < P(t > 2.80) < 0.0025 $
c. $ 0.0025 < P(t > 2.80) < 0.005 $
d. $ 0.005 < P(t > 2.80) < 0.01 $

#### Exercise 12
- **Objective:** Let sample size $ n = 20 $. Find $ P(t < -2.80) $.
- **Options:**
a. $ 0.0005 < P(t < -2.80) < 0.001 $
b. $ 0.001 < P(t < -2.80) < 0.0025 $
c. $ 0.0025 < P(t < -2.80) < 0.005 $
d. $ 0.005 < P(t < -2.80) < 0.01 $

#### Exercise 13
- **Objective:** Let sample size $ n = 20 $. Find $ P(t < -2.80) + P(t > 2.80) $ (i.e., the sum of the two tails).
- **Options:**
a. $ 0.001 < $ sum of the two tails $ < 0.002 $
b. $ 0.002 < $ sum of the two tails $ < 0.005 $
c. $ 0.005 < $ sum of the two tails $ < 0.01 $
d. $ 0.01 < $ sum of the two tails $ < 0.02 $

#### Exercise 14
- **Objective:** Let sample size $ n = 78 $. Find $ P(t < -3.33) $.

**Hint:**
Use the closest degree of freedom, which is $ df = 80 $. Also, since each $ t $ density curve is symmetric, \( P(t <

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