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BaLLatris [955]
3 years ago
13

Please really need help on this please

Mathematics
1 answer:
Vika [28.1K]3 years ago
8 0
0,1 0,7 I think I use to do these
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In August 2003, 56% of employed adults in the United States reported that basic mathematical skills were critical or very import
Serga [27]

Answer:

Yes

Step-by-step explanation:

First, suppose that nothing has changed, and possibility p is still 0.56. It's our null hypothesis. Now, we've got Bernoulli distribution, but 30 is big enough to consider Gaussian distribution instead.

It has mean μ= np =  30×0.56=16.8

standard deviation s = √npq

sqrt(30×0.56×(1-0.56)) = 2.71

So 21 is (21-16.8)/2.71 = 1.5494 standard deviations above the mean. So the level increased with a ˜ 0.005 level of significance, and there is sufficient evidence.

7 0
3 years ago
Which of the following represents a function?
Svetlanka [38]
Is there a none option? if not then it has to be B.
7 0
3 years ago
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Which solid figure has one polygon base?<br><br> pyramid<br> cone<br> cylinder<br> prism
zalisa [80]
A prism would have a polygon base.
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3 years ago
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What is the slope of the line that passes through the points (1, -6) and (-2, –8)?
Sloan [31]

Answer:

Where the line is going

Step-by-step explanation:

Put attention next time

Ps. Just check if its on x or on the y

7 0
2 years ago
What is the probability of all cogs being defective
Sonbull [250]

Prob (first defective) = 4 / 20 = 1/5

Prob(2nd defective) = 3/19

Prob (3rd defective) = 2/18 = 1/9

Pron 4th defective) = 1/ 17

Prob ( all 4 defective) = 1/5 * 3/19 * 1/9 * 1/17 = 1 / 4845 answer

5 0
3 years ago
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