Two hundred adults age 18 to 29 were polled regarding their use of various social media websites, and the resulting data appears in the diagram below. Let F = the event that the person uses social media website F, and T = the event that a person uses social media website T. A person from this survey is randomly chosen. Complete parts (a) through (c) below. 124 20 47 For events A and B, with n(B) > 0, the conditional probability of A given B, denoted P(A|B), is given by which formula below? n(B) n(ANB) O A. P(A|B) = n(ANB) O B. P(A|B) = n(A) n(AUB) n(B) n(ANB) OC. P(A|B) = n(B) O D. P(A|B) = O E. P(A|B) = n(AUB) • n(B) O F. P(A|B) = n(ANB) • n(B) a. Find P(F|T). P(F|T) = (Simplify your answer.) What does this number represent? O A. This is the probability that a person uses both social media websites, F and T. O B. This is the probability that a person uses social media website F, given that the person uses social media website T. OC. This is the probability that a person uses social media website T, given that the person uses social media website F. O D. This is the probability that a person uses at least one social media website, F or T. b. Find P(T|F). P(T|F) = (Simplify your answer.) What does this number represent? O A. This is the probability that a person uses social media website T, given that the person uses social media website F. O B. This is the probability that a person uses both social media websites, F and T. O C. This is the probability that a person uses social media website F, given that the person uses social media website T. O D. This is the probability that a person uses at least one social media website, F or T.
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
Two hundred adults age 18 to 29 were polled regarding their use of various social media websites, and the resulting data appears in the diagram below. Let
F=the
event that the person uses social media website F, and T = the event that a person uses social media website T. A person from this survey is randomly chosen. Complete parts (a) through (c) below. |
|
![**Find \( P(F' \mid T') \).**
\[ P(F' \mid T') = \] ☐ (Simplify your answer.)
**What does this number represent?**
- **A.** This is the probability that a person does not use either social media websites.
- **B.** This is the probability that a person does not use social media website F, given that the person does not use social media website T.
- **C.** This is the probability that a person does not use social media website T, given that the person does not use social media website F.
- **D.** This is the probability that a person uses some other social media website.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc4f752fd-e2b5-4a98-8d20-a9cf3e4d111d%2F5b672e7a-3618-4140-b256-bc6a251d40bd%2Flmljna7_processed.png&w=3840&q=75)
![**Title:** Understanding Conditional Probability through Social Media Usage
**Summary:** A survey of 200 adults aged 18 to 29 explored their use of two social media websites, F and T. The results are depicted in a Venn diagram, where F and T represent users of each website.
**Venn Diagram Explanation:**
- 124 people use only website F.
- 9 people use only website T.
- 20 people use both websites F and T.
**Tasks:**
**1. Conditional Probability Formula Selection**
For events A and B, with \( n(B) > 0 \), the formula for the conditional probability \( P(A|B) \) determines how likely A is given that B has already occurred. Identify the correct formula from the choices:
- \( \text{A. } P(A|B) = \frac{n(B)}{n(A \cap B)} \)
- \( \text{B. } P(A|B) = \frac{n(A \cap B)}{n(A)} \)
- \( \text{C. } P(A|B) = \frac{n(A \cap B)}{n(B)} \) *(Correct Answer)*
- \( \text{D. } P(A|B) = \frac{n(A \cup B)}{n(B)} \)
- \( \text{E. } P(A|B) = n(A \cup B) \cdot n(B) \)
- \( \text{F. } P(A|B) = n(A \cap B) \cdot n(B) \)
**2. Calculation and Interpretation:**
**a. Find \( P(F|T) \)**
Calculate the probability that a person uses social media website F given that they use website T.
- \( P(F|T) = \frac{n(F \cap T)}{n(T)} = \frac{20}{29} \)
*Interpretation:*
This figure represents the probability that a person uses website F given that they already use website T.
**b. Find \( P(T|F) \)**
Calculate the probability that a person uses social media website T given that they use website F.
- \( P(T|F) = \frac{n(F \cap T)}{n(F)} = \frac{20}{144} \)
*Interpretation:*
This figure indicates the probability](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc4f752fd-e2b5-4a98-8d20-a9cf3e4d111d%2F5b672e7a-3618-4140-b256-bc6a251d40bd%2Fhzeghbo_processed.png&w=3840&q=75)
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