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elixir [45]
2 years ago
11

Fr ee poi nts. dele ting my acco unt so here you go​

Mathematics
2 answers:
riadik2000 [5.3K]2 years ago
5 0

Step-by-step explanation:

Thank you for the points BTW why are u deleting it

ankoles [38]2 years ago
3 0

Answer:

thanks for the points.... can you give me brainliest

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Taylor surveys students in one grade level who own at least one pet. She finds that 50% of the students surveyed own 2 pets, 3 s
Llana [10]
First, we need to work out the total number of students who were being surveyed.

We know that half of the students has two pets. The rest of the students make up the other half. So, we have 3 students + 2 students + 8 students = 13 students that make half of the sample population

That means total number of students being surveyed is 13+13=26 students

Then we work out the probability
P(One pet) = 8/26 = 4/13
P(Two pets) = 1/2
P(Three pets) = 3/26
P( Four pets) = 2/26 = 1/13

The probability distribution is shown in the table below. Let x be the number of pets and P(X=x) is the probability of owning the number of pets


3 0
3 years ago
Read 2 more answers
In a sample of 70 stores of a certain​ company, 62 violated a scanner accuracy standard. It has been demonstrated that the condi
uysha [10]

Answer:

We need at least 243 stores.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error of the interval is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

For this problem, we have that:

n = 70, p = \frac{62}{70} = 0.886

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.04 with 95​% confidence using the​ large-sample method.

We need at least n stores.

n is found when M = 0.04. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.04 = 1.96\sqrt{\frac{0.886*0.114}}{n}}

0.04\sqrt{n} = 1.96\sqrt{0.886*0.114}

\sqrt{n} = \frac{1.96\sqrt{0.886*0.114}}{0.04}

(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.886*0.114}}{0.04})^{2}

n = 242.5

Rounding up

We need at least 243 stores.

5 0
2 years ago
Is 4xis the equation 4x-6=4x+3 true
OverLord2011 [107]

Answer:NOPEEE FALSE

Step-by-step explanation:

SO BASICALLY IF YOU SUBTRACT 4X ON BOTH SIDES THEN THAT WOULD BE 0X AND YOU CANT HAVE 0X

8 0
3 years ago
Read 2 more answers
Can someone help me please ?
Katarina [22]

Answer: you can always write a square root, cubic root, etc... As an exponent.

Step-by-step explanation:

A) y^1/2

B) (y+6)^1/5 - 3

Exercise 4

A) 49^1/2 = square root of 49

(Dont have the square symbol y my phone. Lol!)

Always remember... You can write:

A^x/y = y root of A^x

3 0
3 years ago
Find the value of x. please help
yulyashka [42]

Answer:

x= 15

Step-by-step explanation:

Since this is an isosceles triangle, the other angle is also 5x-6

The sum of the angles of a triangle is 180

42+ 5x-6 + 5x-6 = 180

Combine like terms

10x+30 =180

Subtract 30 from each side

10x+30-30 = 180-30

10x = 150

Divide by 10

10x/10 = 150/10

x= 15

4 0
2 years ago
Read 2 more answers
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