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Damm [24]
3 years ago
13

For a data consisting of 9 observations, the sum of 9 values is 360 and the sum of squares of deviation taken from the mean is 2

88. Find the mean and variance of the observation.
Mathematics
1 answer:
maxonik [38]3 years ago
8 0

Answer:

4 ; 32

Step-by-step explanation:

Given that :

Number of observations, n = 9

Let observations = X

ΣX = 360

The mean, (m) is calculated using the formula :

m = ΣX / n

m = 360 / 9

m = 4

Σ(X - m) = 288 (sum of square of deviation )

Variance is calculated using the formula :

[Σ(X - m) / n]

Variance = Sqrt(288 / 9)

Variance = 32

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Approximate the value of each of the irrational numbers below to the nearest thousandth.
Marta_Voda [28]

ANSWER

\sqrt{13}  = 3.606

to the nearest thousandth.

EXPLANATION

The given irrational number is

\sqrt{13}

We use the calculator to evaluate this to obtain,

\sqrt{13}  = 3.605551...

To round to the nearest thousandth means we are rounding to 3 decimal places.

The third decimal place is 5.

The next number is 5 so we round up.

\sqrt{13}  = 3.606

4 0
3 years ago
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lyudmila [28]
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8 0
3 years ago
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VMariaS [17]
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4 0
3 years ago
Tory deposited 3100 and to a savings account that pays simple annual interest rate of 3.38% how much interest will she earn afte
sergiy2304 [10]

Answer:

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Step-by-step explanation:

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Now, define the total time period.

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Now calculate the Total interest earning.

Interest Earned = $3,100 x 3.38% x 1.5 = $157.17

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3 years ago
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3 years ago
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