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Papessa [141]
3 years ago
13

What is the formula to find principal​

Mathematics
2 answers:
Ivanshal [37]3 years ago
8 0
Rearrange the insert formula
Alinara [238K]3 years ago
3 0

Answer:

We can rearrange the interest formula

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Data on IQ for 33 first graders are given as follows: 82, 96, 99, 102, 103, 103, 106, 107, 108, 108, 108, 108, 109, 110, 110, 11
Dahasolnce [82]

Answer:

\bar X = \frac{\sum_{i=1}^n x_i}{n}

Where n represent the sample size, on this case n =33. If we use this formula we got:

\bar X = 113.727

And for this case we know that is the best estimator since is an unbiased estimator for the true population mean since we have this:

E(\bar X) = E(\frac{\sum_{i=1}^n x_i}{n})= \frac{1}{n} \sum_{i=1}^n E(X_i) = \frac{n\mu}{n} = \mu

Step-by-step explanation:

For this case we have the following values given:

82, 96, 99, 102, 103, 103, 106, 107, 108, 108, 108, 108, 109, 110, 110, 111, 113, 113, 113, 113, 115, 115, 118, 118, 119, 121, 122, 122, 127, 132, 136, 140, 146

And we want to estimate the mean value of IQ for the conceptual population.

For this case we can use as estimator for the population mean the sample mean. We know that the sample mean is given by this formula:

\bar X = \frac{\sum_{i=1}^n x_i}{n}

Where n represent the sample size, on this case n =33. If we use this formula we got:

\bar X = 113.727

And for this case we know that is the best estimator since is an unbiased estimator for the true population mean since we have this:

E(\bar X) = E(\frac{\sum_{i=1}^n x_i}{n})= \frac{1}{n} \sum_{i=1}^n E(X_i) = \frac{n\mu}{n} = \mu

5 0
3 years ago
Classify each number below as an integer or not.<br> -18/9 <br> -11/16<br> -1.21<br> -104.41<br> -10
amid [387]

So, first we need to know that an integer is a whole number that can be - and + (Negative and positive). An integer cannot be a decimal nor a fraction.

So remember this and that's the way we can solve the following.

Number 1 is an integer.

Number 2 is an integer.

Number 3 is not an integer.

Number 4 is not an integer.

Number 5 is an integer.

I hope this helps! If it did, may i have Brainliest?

7 0
3 years ago
Geometry help? fill in the blanks accurately pleathe
zlopas [31]

I believe you would want to rotate 90°, then rotate 180°. In case I'm wrong I graphed it out as well so you can double check. The pic is below (I think).


4 0
3 years ago
Both circle A and circle B have a central angle measuring 135°. The ratio of the radius of circle A to the radius of circle B is
ratelena [41]
Let 
rA--------> radius of the circle A
rB-------> radius of the circle B
LA------> the length of the intercepted arc for circle A
LB------> the length of the intercepted arc for circle B

we have that
rA/rB=4/7--------> rB/rA=7/4
LA=(1/2)π

we know that
if Both circle A and circle B have a central angle , the ratio of the radius of circle A to the radius of circle B is equals to the ratio of the length of circle A to the length of circle B
rA/rB=LA/LB--------> LB=LA*rB/rA-----> [(1/2)π*7/4]----> 7/8π

the answer is
the length of the intercepted arc for circle B is 7/8π
3 0
4 years ago
Simplify 5 to the power of 3
sesenic [268]

Answer:

5^3

Step-by-step explanation:

5^3

=5*5*5

=5^3

=125

7 0
3 years ago
Read 2 more answers
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