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ozzi
3 years ago
12

-PLEASE HURRY!-

Mathematics
1 answer:
ZanzabumX [31]3 years ago
3 0

Answer:

like for division?????????

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3 years ago
A computer laboratory manager was in charge of purchasing new battery packs for her lab of laptop computers. She narrowed her ch
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The information is missing. The information is :

                            Battery Pack model 1           Battery Pack model 2

Sample size                      9                                            9

Sample mean                 5 hours                               5.5 hours

Standard deviation        1.5 hours                             1.3 hours

Solution :

Given :

$n_1 = 9, x_1 = 5,s_1 = 1.5$

$n_2 = 9, x_2 = 5.5 ,s_2 = 1.3$

The null hypothesis is :

$H_0: \mu_1-\mu_2=0$

The alternate hypothesis is :

$H_a: \mu_1-\mu_2 \neq0$

Therefore, the standard error is

$SE = \sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}}$

     $ = \sqrt{\frac{1.5^2}{9}+\frac{1.3^2}{9}}$

    = 0.66165

Thus the test statics is

$t=\frac{x_1-x_2}{SE}$

$t=\frac{5-5.5}{0.66165}$

  = -0.756

 

5 0
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