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3 years ago

Construct a 96% confidence interval if a sampling distribution has a mean of 20, standard deviation of 5, and size of 100?

Mathematics

1 answer:

garik1379 [7]3 years ago

6 0

Answer:

wryestudrytfuygiuhi'ojpokplkojih;uglyfkdtrjsezdfxh jshfxdgjcfkhgvbj.k/nl

Step-by-step explanation:

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7th grade math. answer ASAP. If you answer correctly i will give thx, 5 star, and brainliest

Viktor [21]

Okay. First thngs first, let's divide each of them. 2.6/1.3 is 2. Now in terms of exponents, we would just simply subtract the powers, because we are doing division. 9 - 2 is 7. The value of the expression is 2 * 10^7. Even writing the problem out in number form (2,600,000,000/130), you can still see the answer to the problem as 20 million. The answer is B.

8 0

3 years ago

What is the nth term?

kumpel [21]

Let $a_k$ denote the kth term of the sequence. Then

$a_k=a_1+d(k-1)$

where d is the common difference between consecutive terms in the sequence and a₁ is the first term.

The sum of the first n terms is

$S_n=\displaystyle\sum_{k=1}^na_k=a_1+a_2+\cdots+a_{n-1}+a_n$

From the formula for $a_k$ , we get

$S_n=\displaystyle\sum_{k=1}^n(a_1+d(k-1))=a_1\sum_{k=1}^n1+d\sum_{k=1}^n(k-1)$

$S_n=\displaystyle na_1+d\sum_{k=0}^{n-1}k$

$S_n=na_1+\dfrac{d(n-1)n}2$

$S_n=\dfrac n2(2a_1-d+dn)$

So we have $d=-5$ , and $2a_1-d=16$ so that $a_1=\frac{11}2$ .

Then the nth term in the sequence is

$a_n=\dfrac{11}2-5(n-1)=\boxed{\dfrac{21-10n}2}$

7 0

3 years ago

Monganville and Newton are 24 miles apart. On a map the two cities are 3 inches apart. What is the map scale?

Reil [10]

One inch equals 8 miles, or in math terms, this is how we figure It out...

$24m = 3in$

To find the scale we need to find what one inch equals on the map, dmto do this we divide both sides by 3 in. and get 8 miles in reality equals one map inch.

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3 years ago

1. Draw a triangle ABC with A(6,10), B(7,6), and C(10,7).

Musya8 [376]

Answer:

I dont know yet give me a sec

8 0

3 years ago

Given f(x)=x^2+12x+26.

MA_775_DIABLO [31]

Answer:

f(x) = (x+6)² - 10

Step-by-step explanation:

To write the equation in vertex form we, we need to use completing square method.

f(x) = x²+ 12x + 26 = (x² + 2*x*6 + 6²) - 6² + 26 = (x+6)² -36 + 26 =

= (x+6)² - 10

f(x) = (x+6)² - 10

7 0

2 years ago