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2 years ago

6

Jan received -22 points on her exam. She got 11 questions wrong out of 50 questions. How much did Jan penalizedfor each wrong an

swer?

1 answer:

hammer [34]2 years ago

6 0

She was penalized 2 points a question

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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

vovikov84 [41]

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

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

$S_{xx}=\sum x^{2}-\frac{\left (\sum x \right )^{2}}{n}=35.03$

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

The coefficient of correlation is :

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

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3 years ago

Match the proper noun to the common noun.

egoroff_w [7]

Uncle peter-relative

january-month

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Nadya [2.5K]

Answer:

m= 9

Step-by-step explanation:

63/7

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Nataly_w [17]

7% of 232,000 is 16,240
232,000 + 16,240 is 248,240
so 248,240 is the answer

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2: $626.4

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