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katovenus [111]
3 years ago
8

Standard deviation of 300, 785, 670, 187, 760, 724

Mathematics
1 answer:
White raven [17]3 years ago
7 0
STEP 1

Mean = \frac{300+785+670+187+760+724}{6} = \frac{3426}{6}=571

STEP 2

Subtract the mean from each data value then square the answer
300-571=-271 ⇒ (-271)^{2} =73441
785-571=214 ⇒ (214)^{2}=45796
670-571=99 ⇒ (99)^{2}=9801
187-571=-384 ⇒ (-384)^{2} =147456
760-571=189 ⇒ 189^{2}=35721
724-571=153 ⇒ 153^{2} =23409

STEP 3

Add the squared answers in STEP 2 then find the mean

\frac{73441+45796+9801+147456+35721+23409}{6}= \frac{335624}{6}=55937.3

STEP 4

Square root the answer in STEP 3
\sqrt{55937.3} =236.5

Standard deviation is 236.5
 
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Picture 2: Christian reads \frac{3}{8} books per week.

Picture 3: 80% is equal to \frac{4}{5}.

Step-by-step explanation:

Picture 1: Veena ate lunch at a deli. She ordered turkey sandwich for $9.25 and a salad for $4.35. The tax was 7.5%. What is the amount of tax for Veena's meal.

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Therefore,

80% is equal to \frac{4}{5}.

Keywords: percentage, division

Learn more about percentages at:

  • brainly.com/question/10699220
  • brainly.com/question/10703930

#LearnwithBrainly

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