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Lynna [10]
3 years ago
11

Estimate the answear by rounding each number to its greatest place: 199 x 91

Mathematics
2 answers:
Law Incorporation [45]3 years ago
4 0
<span>The estimates answer would be 18,000. Hope i helped!</span>
Nataly [62]3 years ago
3 0
I estimated the answer to be 18,000

Without estimation the answer would be 18,109
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A random sample of 11 students produced the following data, where x is the hours spent per month playing games, and y is the fin
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Answer:

b = - 3.7

Step-by-step explanation:

here are the data values:

x   y          XY        X²

14 46         644       196

15 49         735       225

16 37          592      256

17 42          714        289

18 37          666      324

19 31           589      361

20 25         500      400

21 23          483       441

22 20         440       484

23 15          345       529

24 12         288       576

now we are required to find the summation (total) of all values of X, Y, XY and X².

∑X = 209

∑Y = 337

∑XY = 5996

∑X² = 4081

The formular for finding b is given as:

b = n∑XY - (X)(Y) / n∑X² - (∑X)²

= 11(5996) - (209)(337) / 11(4081) - (209)²

= 65956 - 70433 / 44891 - 43681

= -4477/ 1210

= -3.7

The question asked us to find the <em>value of b</em> but we can  go further to find the equation of the regression line:

a = ∑Y - b∑X / n

= 337 - (-3.7)(209)/  11

=1110.3/11

= 100.94

the equation is:

Y = 100.94 - 3.7X

I hope you find my solution useful!

=

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Step-by-step explanation:

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