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2 years ago

15h=465 :) help me please

Mathematics

1 answer:

drek231 [11]2 years ago

8 0

H=31.
to solve for h, you just divide both sides by 15

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. The National Sleep Foundation surveyed representative samples of adults in six different countries to ask questions about slee

scoundrel [369]

Answer:

Yes the conclusion in the question is a reasonable conclusion

Step-by-step explanation:

From the question we are told that

The sample size is $n_1 = n_2 = n = 250$

The sample mean for USA is $\= x_1 = 391 \ minutes$

The sample mean for Mexico is $\= x_2 = 426 \ minutes$

The sample standard deviation for USA is $s_1 = 25 \ minutes$

The sample standard deviation for Mexico is $s_2 = 49 \ minutes$

The null hypothesis is $H_o : \mu_1 = \mu_2$

The alternative hypothesis is $H_a : \mu_1 < \mu_2$

Generally the test statistics is mathematically represented as

$z = \frac{\= x_1 - \= x_2 }{ \sqrt{ \frac{s_1^2}{n_1} + \frac{s_2^2}{n_2 } } }$

=> $z = \frac{ 391 - 426 }{ \sqrt{ \frac{25^2}{250} + \frac{49^2}{250} } }$

=> $z = -10$

From the z table the area under the normal curve to the left corresponding to -10 is

$p-value = P(Z < -10 ) = 0.00$

Generally from the value obtained we see that

The p-value is < $\alpha$ hence

The decision rule is

Reject the null hypothesis

The conclusion is

The is sufficient evidence to conclude that adults in the United States get less sleep on work nights than adults in Mexico

Hence the conclusion in the question is a reasonable conclusion

6 0

3 years ago

If the 2nd term of a G.P series is 3/2 and the Fourth term is 3/8, find the first and common ratio of the series

V125BC [204]

Step-by-step explanation:

second terms:

ar=3/2

forth term

ar^3=3/8

combine two equation:

r^2=1/4

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a=3 or -3

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3 years ago

Find the area of the parallelogram <br> please help!!

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Answer:

the same:

a= b x h

22 x 12 =264

Step-by-step explanation:

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2 years ago

Of the last 100 customers entering a computer shop, 25 have purchased a computer. If the classical method for computing probabil

SOVA2 [1]

Answer:

0.50

Step-by-step explanation:

The question asks you to apply the classical method of computing probability. In this method, prior events do not interfere in the likelihood of an event happening in the future, instead it states that every possible outcome is equally likely to happen.

In this case there are only two possible outcomes: purchase or not purchase a computer. Therefore, the likelihood that the next customer will purchase a computer is 50% or 0.50.

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3 years ago

The slope-intercept form of the equation of a line that passes through (-5,-1) and (10,-7) is y+7=-2/5(x - 10). What is the stan

wariber [46]

Answer:

2x + 5y = -15 OR 2x + 5y + 15 = 0 Not sure they want it equal to zero

Step-by-step explanation:

y + 7 = -2/5(x - 10)

y + 7 = -2/5 x + 4

2/5x + y =-3

5(2/5 x + y = - 3)

2x + 5y = - 15

2x + 5y + 15 = 0

3 0

3 years ago