I need help with d 1 to d 3. I don't understand what to do.

Mathematics

1 answer:

erik [133]3 years ago

3 0

What????

You just add 1 +3 =4

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4x^1/2 to radical form

Lyrx [107]

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pemdas, so exponent first before multiply
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this is different from
(4x)^1/2

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times that by 4
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3 years ago

Fifty specimens of a new computer chip were tested for speed in a certain application, along with 50 specimens of chips with the

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Answer:

Under 99% confidence level we can say that mean speed of the new chips is greater than that of the old chips

Step-by-step explanation:

$H_{0}$ : Mean speed of the new chip is the same as the old chip

$H_{a}$ : Mean speed of the new chip is greater than the old chip

to calculate the z-statistic we can use the formula:

z= $\frac{M_{n}-M_{o}}{\sqrt{\frac{s_{n}^2}{N_{n}} +\frac{s_{o}^2}{N_{o}} } }$

if we put the numbers then

z= $\frac{495.6-481.2}{\sqrt{\frac{19.4^2}{65}} +\frac{14.3^2}{65} } }$ =4.8171

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3 years ago

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Step2247 [10]

Hello there!

First you had to solving by the fractions parts.

$\frac{5}{9}+\frac{7}{9}=\frac{12}{9}$