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anastassius [24]
2 years ago
12

1. How many fifties are there in one hundred thousand?​

Mathematics
1 answer:
VladimirAG [237]2 years ago
7 0
There are 2,000 fifties in one hundred thousand
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All of the numbers are even so 2

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What is the ratio of 1.5 inch screws to 2.5 inch screws?
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1.5 : 2.5

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In an effort to determine whether any correlation exists between the price of stocks of airlines, an analyst sampled six days of
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Answer:

Check the explanation

Step-by-step explanation:

Following table shows the calculations:

Delta, X      Southwest , Y            X^2              Y^2                      XY

45.96               38.76               2112.3216     1502.3376          1781.4096

46.8                 45.41                2190.24         2062.0681        2125.188

47.93                15.7                 2297.2849      246.49            752.501

51.78                49.58              2681.1684      2458.1764        2567.2524

52.17                44.34              2721.7089      1966.0356        2313.2178

47.36                18                   2242.9696            324               852.48

Total 292       211.79               14245.6934      8559.1077      10392.0488

Sample size: n =6

Now

S_{yy}=\sum y^{2}-\frac{\left (\sum y \right )^{2}}{n}=1083.27

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S_{xy}=\sum xy-\frac{\left (\sum x \right )\left (\sum y \right )}{n}=84.94

The coefficient of correlation is :

r=\frac{S_{xy}}{\sqrt{S_{xx}S_{yy}}}=0.436

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Who was responsible for inventing the first working four-stroke engine?<br>​
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Nikolaus Otto was  responsible for inventing the first working four-stroke engine.

​

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