HELP PLEASE
I DONT UNDERSTAND THIS AT ALL
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Answer:

a) what is the point estimate used to create this confidence interval?

[a] 0.22

[b] 0.28

[c] 0.26

[d] 0.25  <-----------------------------

b) what is the margin of error used to create this confidence interval?

[a] .06

[b] .03    <-----------------------------

[c] .035

[d] .055

c) based on the confidence interval, it is plausible that the true proportion of adult males who smoke cigarettes is 27%?

[a] yes   <-------------------------------

[b] no

Step-by-step explanation:

Answer:

120 cm²

Step-by-step explanation:

Applying,

A = Ph................... Equation 1

Where A = Literal Area of the triangular prism, P = Perimeter of the base, h = height.

But,

P = a+b+c............... Equation 2

Where a, b, c represent the three sides of the triangular base

Therefore,

A = h(a+b+c)............... Equation 3

From the question,

Given: h = 8 cm, a = 4 cm, b = 5 cm, c = 6 cm

Substitute these values into equation 3

A = 8(4+5+6)

A = 8(15)

A = 120 cm²

Answer:

They are all equal at the sides so , the answer is 4.8m , I think the perimeter is given just to confuse you.....

Answer:

[tex]x=12.07[/tex]

Step-by-step explanation:

From the question we are told that:

Mean [tex]\=x =12cm[/tex]

Standard deviation [tex]\sigma=0.04[/tex]

Significance level [tex]\alpha=5\%=0.05[/tex]

Therefore

Confidence level [tex]95\%=0.95[/tex]

From table [tex]P(z<1.645)=0.95[/tex]

Generally the equation for Z-score is mathematically given by

[tex]z=\frac{x-\mu}{\sigma}[/tex]

[tex]x=z\sigma+\mu[/tex]

[tex]x=1.645*0.04+12[/tex]

[tex]x=12.07[/tex]

Answer:

there is no profit there is loss because CP is greater than SP

Step-by-step explanation:

loss=CP-SP

=Rs480-Rs420

=Rs60

loss%=loss/cp*100%

=60/480*100%

=6000/480

=12.5%

Answer:

V=lwh /3

Step-by-step explanation:

Answer:

There's 3 questions which one do I answer?

Step-by-step explanation:

Answer:

15.25 km =15,250 m

so Jada ran further

Answer:

Jada ran farther

Step-by-step explanation:

First, convert 8,500 to kilometers.

8,500 ÷ 1,000 = 8.5

15.25 > 8.5

Have a wonderful day!

Answer:

B. 24

Step-by-step explanation:

Answer:

3 days

Step-by-step explanation:

well, in 2 days mitch can jar 12 liters of jam right? but 12 is divisible by 2. so let’s just do that to help us out later, 12 / 2 = 6

now that we have that, let’s make sure. in 1 day he can jar 6, in 2 he can jar 12.

that seems right! so now, can we add 6 to 12 to make 18? yep! how many more times do we need to add 6? 1 time. so 12 + 6 = 18. every 6 liters is 1 day. so 1 day + 1 day + 1 day (18 liters) is 3 days total!

hope this helped you!

Answer:

I think the answer is 2 because 2.5 x 2 = 5.

I'm sorry if this is wrong, I'm a bit unsure.

Step-by-step explanation:

Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!

Answer:

2

Step-by-step explanation:

we simply divide 2 1/2 from 5

5÷2 1/2

5÷5/2

5×2/5

2(we cancel five)

Answer:

Mean - 1.5

Median - 1.5

Step-by-step explanation:

Median = middle number

Means = all numbers added up and divided by how many are there

addtion

becuase when you add the number of boys and girls together you get  the overall number of the class.

Answer: properties would be multiplication and the answer would be 40%

Step-by-step explanation: You can use cross multiplication to identify the answer to this.

Answer:

228525-Look below for steps:)

Step-by-step explanation:

Step 1:

6925

*   33

______

Step 2:

5*3=15

carry the one

3*2+1=7

9*3=27

carry the 2

6*3+2=20

SO your first number is 20775 but we are NOT done yet!

add a zero below 5

5*3=15

carry the one

3*2+1=7

9*3=27 carry the 2

then 6*3+2=20

then add 207750+20775

which equals....

228525

so 228525 is your answer!!!

I really do hope this made sense!

Have a great day!

- Hailey: D

(NOTHING IS COPIED AND PASTED!!!!!)

Answer:

Step-by-step explanation:

A hypotenuse is calculated on a triangle with a right angle. The hypotenuse is the side opposite the sides with the right angle. The equation is a^2 + b^2=c^2 where the hypotenuse is the square root of c.

Answer:

3 and 5 the two middle numbers

median is the middle number in a sequence

Answer:

5

Step-by-step explanation:

First we put all the numbers in order like so: 3,4,5,5,6,7

If we had a odd number of numbers we would just pick the middle one

But since here we have 6 numbers its even so 5 and 5 come in the middle so it is automatically 5.

Hope I could help!

Answer:

The 90% confidence interval for the difference of the population means is approximately (-17.98, -2.02).

Step-by-step explanation:

Before building the confidence interval, we need to understand the central limit theorem and subtraction of normal variables.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean [tex]\mu = p[/tex] and standard deviation [tex]s = \sqrt{\frac{p(1-p)}{n}}[/tex]

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

Boys:

Mean of 75, sample of 45, standard deviation of 25.

This means that [tex]\mu_B = 75, s_B = \frac{25}{\sqrt{45}}[/tex]

Girls:

Mean of 85, sample of 30, standard deviation of 17.

This means that [tex]\mu_G = 85, s_G = \frac{17}{\sqrt{30}}[/tex]

Distribution of the difference of mean grades of boys and girls:

[tex]\mu = \mu_B - \mu_G = 75 - 85 = -10[/tex]

[tex]s = \sqrt{s_B^2+s_G^2} = \sqrt{(\frac{25}{\sqrt{45}})^2+(\frac{17}{\sqrt{30}})^2} = 4.85[/tex]

Confidence interval:

As stated, the critical value is [tex]z = 1.645[/tex]

The margin of error is of:

[tex]M = zs = 1.645*4.85 = 7.98[/tex]

Lower bound:

[tex]\mu - M = -10 - 7.98 = -17.98[/tex]

Upper bound:

[tex]\mu + M = -10 + 7.98 = -2.02[/tex]

The 90% confidence interval for the difference of the population means is approximately (-17.98, -2.02).

Answer:

B

Step-by-step explanation:

The formula for the area of a triangle is given as:

A = ½*base*height

A = ½*b*h

A = (bh)2

If we know the area (A) and the base, to find the height, the following would be done:

Divide both sides by b

A/b = h/2

Multiply both sides by 2

[tex] \frac{A}{b} * 2 = h [/tex]

As we can see here, to find the base, we would divide the area by the vase, then multiply what we get by 2.

Answer:

C. Associative property of multiplication

Step-by-step explanation:

The associative property of multiplication states that the way in which factors are grouped in a multiplication problem does not change the product.

Answer:

Hence, the list ten different possible outcomes are [tex](1,2),(1,3),(1,4),(1,5),(2,3),(2,4),(2,5),(3,4),(3,5),(4,5)[/tex], the probability distribution of X are [tex]0.3,0.6,0.1[/tex] and the cumulative distribution function is [tex]F(x)=\left\{\begin{array}{lc}0 & x<0 \\0.3 & 0 \leq x<1 \\0.9 & 1 \leq x<2 \\1 & 2 \leq x\end{array}\right.[/tex]

Step-by-step explanation:

(a)

List the ten different possible outcomes.

The number of ways that two boards are drawn from each lot of [tex]5[/tex] lots are [tex]{5 \choose 2}[/tex]

    [tex]{5 \choose 2}=\frac{5!}{2!(5-2)!}[/tex]

[tex]\Rightarrow {5 \choose 2}=\frac{5\times 4\times 3!}{2!\times 3!}[/tex]

[tex]\Rightarrow {5 \choose 2}=\frac{5\times 4}{2!}[/tex]

[tex]\Rightarrow {5 \choose 2}=\frac{20}{2}[/tex]

[tex]\Rightarrow {5 \choose 2}=10[/tex]

So, the [tex]10[/tex] combinations are as follows :

[tex](1,2),(1,3),(1,4),(1,5),(2,3),(2,4),(2,5),(3,4),(3,5),(4,5)[/tex]

(b)

The aim is to find the probability distribution when two boards are chosen at random and board's one and two is the only defective boards.

Let X be the number of defective boards in the lot.

Therefore, select the combinations of the boards that are without 1 and 2 from 10 combinations.

Compute the [tex]P(X=0)[/tex]

 [tex]P(X=0)=P\{(3,4),(3,5),(4,5)\}[/tex]

                 [tex]=\frac{3}{10}[/tex]

                 [tex]=0.3[/tex]

The probability that defectives did not occur in the lot is 0.3

Compute the [tex]P(X=1)[/tex]

Select the combinations of the boards that are with one defective either 1 and 2 from the 10 combinations.

[tex]P(X=1)=P\{(1,3),(1,4),(1,5),(2,3),(2,4),(2,5)\}[/tex]

                [tex]=\frac{6}{10}[/tex]

                [tex]=0.6[/tex]

The probability that one defectives occurred in the lot is 0.6.

Compute the [tex]P(X=2)[/tex]

Select the combinations of the boards that are with two defective 1 and 2 from the 10 combinations.

[tex]P(X=2)=P\{(1,2)\}[/tex]

                [tex]=\frac{1}{10}[/tex]

                [tex]=0.1[/tex]

The probability that two defectives occurred in the lot is 0.1.

(c)

The cumulative distribution function (cdf)[tex]F(X=x)[/tex]  is defined as,

[tex]\begin{aligned}F(X&=x)=P(X \leq x) \\F(0) &=P(X \leq 0) \\&=P(X=0) \\&=0.3 \\F(1) &=P(X \leq 1) \\&=P(X=0)+P(X=1) \\&=0.3+0.6 \\&=0.9 \\F(2) &=P(X \leq 2) \\&=P(X=0)+P(X=1)+P(X=2) \\&=0.3+0.6+0.1 \\&=1.0\end{aligned}[/tex]

Therefore, the cumulative distribution function (cdf) [tex]F(X=x)[/tex] is,

[tex]F(x)=\left\{\begin{array}{lc}0 & x<0 \\0.3 & 0 \leq x<1 \\0.9 & 1 \leq x<2 \\1 & 2 \leq x\end{array}\right.[/tex]

She will need 6 yards. the permiter is 16 which 5 wouldnt be enough

Answer:

Just Assume that the transverse axis is horizontal

Answer:

yes

Step-by-step explanation:

because in order to create a right triangle all of its sides must be different

Answer:

Yes

Step-by-step explanation:

Using the Pathagerum theorm (C**2 = A**2 + B**2)

The hypotinuse as always the longest side except for an equal lateral triangle. So if it is a right angle triagle so if true then,

13**2 =  5**2 + 12**2

169 = 25 + 144

169 = 169

so it is true (YES).

Answer:

8.56 x 2.1 = 17.967 or you can sum up to 18. Hope this helps!

Answer:

2 solutions

-1 and 2

Step-by-step explanation:

Answer:

1. x - 5 = 20

2. x + 2y = -6

3. 5x² = 12

Step-by-step explanation:

1. 5 less than x is 20

x - 5 = 20

2. the sum of x and twice y equals -6

x + 2y = -6

3. the product of 5 and x squared results in 12

5x² = 12