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alisha [4.7K]
3 years ago
8

14 times 2/7 the answer is simplified

Mathematics
1 answer:
valina [46]3 years ago
5 0

Answer:

4

Step-by-step explanation:

2/7 X 14

do 14 divided by 7 which is 2

do 2 X 2 = 4

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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
How many cups of flour are needed if we increase the recipe by 50%?
TEA [102]

Answer:it is 2

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
34 is what percentage of 40
Zarrin [17]
Well 34 is 85% of 40
6 0
3 years ago
FREE BRAINLIEST!: (n+2) to the power of 2 - 5a + 1 when n=6 and a=2
BlackZzzverrR [31]

Answer:

55

Step-by-step explanation:

2−5+1+8

11−5

i add 8 because  n is 6 so add 2 it is 8 so i put it in the problem  and got 55

have a nice day and sorry if wrong T_T

6 0
2 years ago
I need help please ????
Rudiy27

9514 1404 393

Answer:

  see attached

Step-by-step explanation:

I like to use a spreadsheet for repetitive calculations. The distances are computed from the distance formula:

  d = √((x2 -x1)^2 +(y2 -y1)^2)

The results are shown in the second attachment. The drawing in the first attachment has the lengths rounded to the nearest tenth.

7 0
2 years ago
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