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SVETLANKA909090 [29]
3 years ago
8

How many soulotion does y=4x−7 y=x−3 ​have

Mathematics
1 answer:
dolphi86 [110]3 years ago
8 0
That equation has one solution
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A group of researchers wants to know whether men are more likely than women to contract a novel coronavirus. They surveyed two r
olasank [31]

Answer:

Test statistic Z= 0.13008 < 1.96 at 0.10 level of significance

null hypothesis is accepted

There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

Step-by-step explanation:

<em>Step(I)</em>:-

Given surveyed two random samples of 390 men and 360 women who were tested

first sample proportion

                    p_{1} = \frac{360}{390} = 0.9230

second sample proportion

                  p_{2} = \frac{47}{52} = 0.9038

Step(ii):-

Null hypothesis : H₀ : There is no difference  proportion of positive tests among men is different from the proportion of positive tests among women

Alternative Hypothesis:-

There is difference between proportion of positive tests among men is different from the proportion of positive tests among women

 

Z = \frac{p_{1}- p_{2} }{\sqrt{PQ(\frac{1}{n_{1} }+\frac{1}{n_{2} }  } }

where

          P = \frac{n_{1}p_{1} +n_{2}  p_{2} }{n_{1}+n_{2}  }

         P =  0.920

Z= \frac{0.9230-0.9038}{\sqrt{0.920 X0.08(\frac{1}{390}+\frac{1}{52}  } )}

Test statistic Z =  0.13008

Level of significance = 0.10

The critical value Z₀.₁₀ = 1.645

Test statistic Z=0.13008 < 1.645 at 0.1 level of significance

Null hypothesis is accepted

There is no difference proportion of positive tests among men is different from the proportion of positive tests among women







7 0
3 years ago
In this equation, what is n?
raketka [301]
N is the variable, you solve by subtracting 6 from 20, getting n = 14.
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3 years ago
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If you divide me by 42, the<br> quotient is 56. What number<br> am I?
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2352

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2 years ago
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A recipe calls for 8 cups of flour for every 4 cups of sugar. How many cups of sugar are used for each cup of flour?
ANEK [815]

Answer:

2

Step-by-step explanation:

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2 years ago
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Help plzzzzzzzzzzzzzzzzz
Butoxors [25]

Answer:

6 % is the answer

Step-by-step explanation:

6.50 x 6%=0.39

6.50+0.39=6.89

4 0
3 years ago
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