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Yuri [45]
4 years ago
14

0/0 please need help. grade depends on it

Mathematics
1 answer:
Ipatiy [6.2K]4 years ago
6 0

Answer:

well you gotta give us a question. whats the question?

Step-by-step explanation:

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In a sample of 388 people in a certain, 22% had red hair. Find a 99% confidence interval for the proportion of people in the cou
Anit [1.1K]

Answer: (0.1658, 0.2742)

Step-by-step explanation:

Formula to find the confidence interval for population proportion is given by :-

\hat{p}\pm z^*\sqrrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

, where  n= sample size

z*= Critical value

\hat{p} = sample proportion.

As per given , we have

Significance level : \alpha=1-0.99=0.01

According to z-table, Critical value for 99% confidence interval : z*=2.576

Let p be the proportion of people in the country that have red hair.

n= 388

\hat{p}=0.22

Now, required confidence interval for proportion of people in the country that have red hair will be :-

0.22\pm (2.576)\sqrt{\dfrac{0.22(1-0.22)}{388}}

0.22\pm (2.576)\sqrt{0.000442268}

0.22\pm (2.576)(0.02103)

(0.22-0.05417328,\ 0.22+0.05417328 )=(0.16582672,\ 0.27417328)\\\\\approx(0.1658,\ 0.2742)

The 99% confidence interval for the proportion of people in the country that have red hair= (0.1658, 0.2742)

8 0
3 years ago
Help with my homework
irinina [24]
The answer is B, there’s no solution.
6 0
2 years ago
Culture A or culture B ??
RSB [31]
It would be B
<span>41943040 is the total for B</span>
3 0
4 years ago
The measures of the three angles of a triangle are (X)°,(2x)°and (3x)° what is the value of x
kvv77 [185]

Answer:

x=30

Step-by-step explanation:

Add up all of the values of the angles and set it equal to 180 degrees since a triangle is always made up of angles that have a sum of 180 degrees.

x+2x+3x=180

6x=180

x=30

7 0
3 years ago
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Find percentage of the number 35% of 750
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Answer:

35% of 750 is 262.5

Step-by-step explanation:


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