Chapter 3: Q 3.17. (page 101)

Consider these sample data: $x_{1} = 1, x_{2} = 7, x_{3} = 4, x_{4} = 5, x_{5} = 10$
a) Find role="math" localid="1650821862719" $n$
b) Compute role="math" localid="1650822690845" $\sum x_{i}$
c) Determine $\bar{x}$ .

Short Answer

Expert verified

$a) 5 b) 27 c) 5.4$

Step by step solution

Step 1. Given information.

Consider these sample data: $x_{1} = 1, x_{2} = 7, x_{3} = 4, x_{4} = 5, x_{5} = 10$

Step 2. Find n.

The sample size is $n = 5$ .

Step 3. Compute ∑xi.

$\sum_{i = 5} x_{5} = x_{1} + x_{2} + x_{3} + x_{4} + x_{5} = 1 + 7 + 4 + 5 + 10 = 27$

Step 4. Compute x-.

$\bar{x} = \frac{\sum_{i = 5} x_{i}}{n} = \frac{27}{5} = 5.4$

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Consider these sample data: $x_{1} = 1, x_{2} = 7, x_{3} = 4, x_{4} = 5, x_{5} = 10$
a) Find role="math" localid="1650821862719" $n$
b) Compute role="math" localid="1650822690845" $\sum x_{i}$
c) Determine $\bar{x}$ .

Short Answer

Step by step solution

Step 1. Given information.

Step 2. Find n.

Step 3. Compute ∑xi.

Step 4. Compute x-.

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Consider these sample data: x1=1,x2=7,x3=4,x4=5,x5=10a) Find role="math" localid="1650821862719" nb) Compute role="math" localid="1650822690845" ∑xic) Determinex-.

Short Answer

Step by step solution

Step 1. Given information.

Step 2. Find n.

Step 3. Compute ∑xi.

Step 4. Compute x-.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Mechanics Maths

Calculus

Applied Mathematics

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Geometry

Probability and Statistics

Study anywhere. Anytime. Across all devices.

Consider these sample data: $x_{1} = 1, x_{2} = 7, x_{3} = 4, x_{4} = 5, x_{5} = 10$
a) Find role="math" localid="1650821862719" $n$
b) Compute role="math" localid="1650822690845" $\sum x_{i}$
c) Determine $\bar{x}$ .