3 years ago

What do the medians and ranges of two dot plots tell you about the data

1 answer:

5 0

That both (along with the mean) help the data be described the data's spread, which can be the slope if only two points.

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Quality control is an important issue at ACME Company which manufacturers light bulbs. In order to conduct testing of the life h

mrs_skeptik [129]

Answer: 3424.28

Step-by-step explanation:

Given data : 378, 361, 350, 375, 200, 391, 375, 368, 321

Number of data values = 9

Mean : $\overline{x}=\dfrac{\sum^n_{i=1} x_i}{n}$

$\\\\=\dfrac{378+361+350+375+200+391+375+368+321}{9}\\\\=\dfrac{3119}{9}\approx346.56$

Variance = $\dfrac{\sum^n_{i=1} (x_i-\overline{x})^2}{n-1}$

$\sum^n_{i=1} (x_i-\overline{x})^2 = (31.44)^2+(14.44)^2+(3.44)^2+(28.44)^2+(-146.56)^2+(44.44)^2+(28.44)^2+(21.44)^2+(-25.56)^2\\\\=27394.2224$

Variance = $\dfrac{27394.2224}{8}=3424.2775\approx3424.28$

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3 years ago

when three or more numbers are multipiled the product is the same regardless of the order of the multiplicands

BlackZzzverrR [31]

Answer:

Associative property of multiplication.

Step-by-step explanation:

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3 years ago

0.2x + 1 = 1.6x + 3.1 What value of x satisfies the equation above?

guapka [62]

Answer:

x = -1.5

General Formulas and Concepts:

Pre-Alg

Order of Operations: BPEMDAS
Equality Properties

Step-by-step explanation:

Step 1: Define equation

0.2x + 1 = 1.6x + 3.1

Step 2: Solve for x

Subtract 0.2x on both sides: 1 = 1.4x + 3.1
Subtract 3.1 on both sides: -2.1 = 1.4x
Divide both sides by 1.4: -1.5 = x
Rewrite: x = -1.5

Step 3: Check

Plug in x to verify it's a solution.

Substitution: 0.2(-1.5) + 1 = 1.6(-1.5) + 3.1
Multiply: -0.3 + 1 = -2.4 + 3.1
Add: 0.7 = 0.7

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3 years ago

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Michaela is competing in a race and what she felt the runs and rides a bicycle she runs 5 km in 0.5 hours and ride her bicycle 2

Nat2105 [25]

Answer:

Step-by-step explanation:

if she runs 5 km in half an hour, she runs 10 in a whole hour.

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3 years ago

Alice bought 24 feet of yarn. How many yards of yarn did she purchase?

NARA [144]

Answer:

8 yards

Step-by-step explanation:

3 feet is 1 yard, so 24 feet is 8 yards

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4 years ago

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