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vfiekz [6]
3 years ago
14

Christine is currently taking a college astronomy class and the instructor often gives quizzes. On the past seven quizzes, Chris

tine got the scores shown below. Find the standard deviation, rounding to one more decimal place than is present in the original data. 50 15 31 27 11 42 71
Mathematics
2 answers:
Law Incorporation [45]3 years ago
7 0

The answer is 20.9 when rounded it is 21

ElenaW [278]3 years ago
7 0

Answer:

19.4

Step-by-step explanation:

Given data,

50,    15,       31,        27,         11,        42,        71,

Let x represents the score,

Here, the number of scores, n = 7,

Thus, the mean score is,

\bar{x}=\frac{50 + 15 + 31 + 27 + 11 + 42 + 71}{7}=\frac{247}{7}

Hence, the standard deviation of the given data is,

\sigma = \sqrt{\frac{\sum (x-\bar{x})^2}{n}}

=\sqrt{\frac{\sum(x-\frac{247}{7})^2}{7}}

=\sqrt{2625.4285714286}{7}}

=\sqrt{375.0612244898}

=19.366497476\approx 19.4

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xxMikexx [17]

Answer:

- 1800 ; 4284.8579 ;

Step-by-step explanation:

Given the table :

Outcome _____ probability

-12000 ________ 0.15

__ 0 __________ 0.85

Expected loss, m: Σx*p(x)

(-12000 * 0.15) + (0 * 0.85)

-1800 + 0 = - 1800

Standard deviation = sqrt(Var(x))

Var(x) = Σx²*p(x) - m²

(-12000^2 * 0.15) + (0^2 * 0.85)] - 1800^2

21,600,000 - 3240000

= 18360000

Standard deviation = sqrt(18360000)

Standard deviation = 4284.8579

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2 years ago
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Nataly_w [17]
I will mark brainlist please help

Story : A Dog’s Tale by Mark Twain

4. Read this sentence from the selection.

“Whenever she heard a large word she said it over to herself many times, and so was able to keep it until there was a dogmatic gathering in the neighborhood.”

In this sentence the word dogmatic is used as —

• an insightful simile
• a descriptive metaphor
• a humorous play on words
• an illuminating allusion


5. In the last paragraph the narrator says his mother would “fetch out a long word.” The connotations of the word fetch remind the reader that the narrator’s mother —

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8. What is ironic about the author’s mother showing off with her knowledge of the word unintellectual?

• Her child knew she didn’t understand the word correctly.

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• She did not know any synonyms for the word.


9. Which type of person is most like the author’s mother?

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3 years ago
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qaws [65]

Answer:

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Step-by-step explanation:

If the salvage value is 20% of the cost, then 80% of the cost will be depreciated over 10 years. Over the 5 years from Jan 1 20X1 to Dec 31 20X5, the $10,000 accumulated depreciation represents 5/10 of that 80%, or 40% of the initial cost.

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The acquisition cost of the equipment was $25,000.

8 0
3 years ago
Find the Area please help me
Serggg [28]

Step-by-step explanation:

Area for a right angle triangle = 1/2 bh

b = Base

h = Height

A = 1/2×bh

= 1/2 × 2c^3d^2 × 4c

= (2c^3d^2 × 4c) / 2

= c^3d^2 × 2c

= 2c^4 × d^2

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Answer:

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Is the required answer.

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