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2 years ago

The sum of differences between sample observations and the sample mean is equal to?

1 answer:

5 0

The standard deviation is the mean of the sum of the squared deviations between each observation and the mean. The measure of dispersion that is the easiest to compute is the interquartile range.

The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers. While a high standard deviation implies that the values are dispersed over a wider range, a low standard deviation shows that the values tend to be close to the mean of the collection.

The term "standard deviation" (or "") refers to a measurement of the data's dispersion from the mean. A low standard deviation implies that the data are grouped around the mean, whereas a large standard deviation shows that the data are more dispersed.

Learn more about standard deviation here

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In a test containing 10 questions, (+5) marks are awarded for every correct answer, (-1) mark for every incorrect answer and 0 f

natka813 [3]

Answer:

Step-by-step explanation:

10 questions = 4 correct + 6 incorrect

4 correct = 4* 5 = 20

6 incorrect = 6* (-1) = -6

His score is 20 -6 = 14 points

6 0

3 years ago

PLSSSSSSSSSSSSSSSSSSSSSSS HELP GEOMETRY

Dvinal [7]

Answer:

Statement 1. ∠ 2 and ∠ 5 are supplementary.

Reason 1. It is given.

Reason 2. They are vertically opposite angles.

Reason 3. Since ∠ 2 and ∠ 5 are supplementary and ∠ 3 = ∠ 2

Statement 4. Line l ║ Line m

Reason 4. The consecutive interior angles ∠ 3 and ∠ 5 are supplementary.

Step-by-step explanation:

Statement 1. ∠ 2 and ∠ 5 are supplementary.

Reason 1. It is given.

Statement 2. ∠ 3 = ∠ 2

Reason 2. They are vertically opposite angles.

Statement 3. ∠ 3 and ∠ 5 are supplementary.

Reason 3. Since ∠ 2 and ∠ 5 are supplementary and ∠ 3 = ∠ 2

Statement 4. Line l ║ Line m

Reason 4. The consecutive interior angles ∠ 3 and ∠ 5 are supplementary. (Answer)

3 0

3 years ago

yuan bought dried beans for an art project. if the beans cost $0.60 per pound, how many pounds of beans did he buy for $18.60

slega [8]

Answer: 31

I hope this helps and have a great day!

8 0

3 years ago

baseball card come in packs of a dozen 12 cards matt has 132 baseballcards.how many packs of baseball cards did he buy i need he

Hunter-Best [27]

Well let's see first we have to divide
132 divided by 12 is 11
Now to check and prove your answer we should use the multiplication.
11 times 12 is 132.
So now you have a solid answer with proof behind it.
If u need a sentence you might want it to go something like this;
Matt brought 11 packs of baseball cards since 132 divided by 12 is 11. 12 times 11 is 132 cards.
Hope I helped!

5 0

3 years ago

Read 2 more answers

M and n are both integers. Select all the statements that are true if m and n are also equal to each other. m - n = n - m OR +m

alexandr402 [8]

Answer:

The true statements are;

(i) m - n = n - m

(ii) +m (-n) = m - n

(iii) 0 = m - n

Step-by-step explanation:

We are given that m and n are both integers and we have to select all the statements that are true if m and n are also equal to each other.

(i) The given situation is: m - n = n - m

LHS = m - n

= m - m {because m and n are equal}

= 0

RHS = n - m

= n - n {because m and n are equal}

= 0

Hence, the given statement is true because LHS = RHS = 0.

(ii) The given situation is: +m (- n) = m - n

LHS = +m (- n)

= m - n

= m - m {because m and n are equal}

= 0

RHS = m - n

= n - n {because m and n are equal}

= 0

Hence, the given statement is true because LHS = RHS = 0.

(iii) The given situation is: 0 = m - n

LHS = 0

RHS = m - n

= m - m {because m and n are equal}

= 0

Hence, the given statement is true because LHS = RHS = 0.

(iv) The given situation is: m + n = 0

RHS = 0

LHS = m + n

= m + m {because m and n are equal}

= 2m

Hence, the given statement is not true because LHS $\neq$ RHS.

3 0

4 years ago

Read 2 more answers