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3 years ago

Determine if the set is the empty set. X | x > 7 and x < 10

Mathematics

2 answers:

Alex73 [517]3 years ago

8 0

HEY THERE!!

This is not an empty set because there can be any value in place of x from 7 to 10.

HOPE IT HELPED.

sveticcg [70]3 years ago

3 0

x > 7 x < 10

7 o---------------------o 10

This is not an empty set. x contains all of the values between 7 and 10.

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3 years ago

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Answer:

$t _{critical} = 1.760$

t = 2.2450

d. 0.264

Step-by-step explanation:

The null hypothesis is:

$H_o: \mu_1 - \mu_2 = 0$

Alternative hypothesis;

$H_a : \mu_1 - \mu_2 > 0\\$

The pooled variance t-Test would have been determined if the population variance are the same.

$S_p^2 = \dfrac{(n_1-1)S_1^2+(n_2-1)S^2_2}{(n_1-1)+(n_2-1)}$

$S_p^2 = \dfrac{(8-1)2.507^2+(8-1)2.8282^2}{(8-1)+(8-1)}$

$S_p^2 = 7.14$

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$t= \dfrac{(9-6)-0}{\sqrt{7.14 ( \dfrac{1}{8} +\dfrac{1}{8})}}$

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df = 7 + 7

df = 14

At df = 14 and ∝ = 0.05;

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The percentage of the variance is;

$r^2 = \dfrac{t^2}{t^2 + df}$

$r^2 = \dfrac{2.2450^2}{2.2450^2 + 14}$

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2 years ago

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Step-by-step explanation:

Since we have given that

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So, at $21.85, the supply will equal to demand.

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