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MakcuM [25]
3 years ago
12

Please help me I will make you the brainiest

Mathematics
2 answers:
Anna35 [415]3 years ago
5 0
Answer:...


Explanation:
Sedaia [141]3 years ago
4 0
Em that’s abit hard
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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
How much ounces are in 22 grams 0.035x
Daniel [21]

Answer:

0.77 ounces

My apologies if my answer is wrong :)

8 0
3 years ago
Read 2 more answers
Given the equation of a circle below, find the diameter of the circle. Use only the digits 0-9 to enter the diameter.
Illusion [34]

Answer:

The diameter of the circle is 22 units.

Step-by-step explanation:

x² + y² - 16x + 12y = 21      I graphed this equation on the graph below.

If this answer is correct, please make me Brainliest!

6 0
3 years ago
Jerry has a new job and earns a salary of $45,000. Victoria has a new job and earns a salary of $54,000. Jerry will receive a sa
ch4aika [34]
The answer is d I think
5 0
3 years ago
Read 2 more answers
a green ribbon is 9 inches long. a red ribbon is 1/10 the length of the green ribbon. a purple ribbon is 10 times as long as the
pishuonlain [190]
Answer: 900 inch
There is 3 ribbon in this question, Red ribbon(R), green ribbon(G) and purple ribbon(P). The relation would be
1. R= 9 inch
2. R= 1/10 G
3. P= 10 G

If you insert equation 1 into 2 then you will get:
9inch= 1/10G
G= 90 inch

After that insert the new equation into equation 3:
P= 10x 90 inch
P= 900inch
7 0
3 years ago
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