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Elodia [21]
3 years ago
10

A group of students are randomly placed in either a traditional AP Stat class or an online-only AP Stat class. Both classes take

the same tests. On the first test, the 250 students in the traditional class got an average of 77.5 and a standard deviation of 8.4. The 190 students in the online class scored an average of 79.8 with a standard deviation of 5.1. What is the test statistic for a test with hypotheses
Mathematics
1 answer:
BaLLatris [955]3 years ago
8 0

Answer:

Mean or Expected Value:

μ

=

∑

x

i

n

X

x

P

(

x

)

Standard Deviation:

σ

=

√

∑

x

i

n

X

(

x

−

μ

)

2

P

(

x

)

Step-by-step explanation:

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GIVING BRAINIEST IF CORRECT!!<br><br> Factor x^4 - 16 completely
ioda

Answer:

(x^2 + 4)(x + 2)(x - 2)

Step-by-step explanation:

Hello!

We can use the difference of square method.

<h2>Difference Of Squares (DOS)</h2>

The formula for the DOS is (a + b)(a - b) = a^2 - b^2

It is a simple way to factor polynomials.

The criteria:

  • Has to begin and end with a perfect square
  • The operation has to be subtraction

<h3>Factor:</h3>
  • x^4 - 16

Begins with a perfect square (x² * x²) and ends with a perfect square (4 * 4)

  • (x^2 + 4)(x^2 - 4)

Warning! Watch out, there may be another DOS!

x^2 - 4 is another DOS

  • (x^2 + 4)(x + 2)(x - 2)

The x² + 4 is not a DOS because the operation is addition.

The final factored form is (x^2 + 4)(x + 2)(x - 2)

8 0
2 years ago
Find the factors of function g.
SashulF [63]
This will be 2400 cause there is nothing in the ones place
3 0
3 years ago
The Washingtons but a studio apartment for $240,000. They pay a down payment of $60,000. What percent of the purchase price woul
Ludmilka [50]
It would be 5%. I know the answer is right I just don’t know how to explain it. Sry. But I hope this helps.
5 0
3 years ago
Nineteen less than 6 times a number is the same as 16 more than the number. The equation is The solution is x -7 7.​
Crank

Answer:

The number is 7

Step-by-step explanation:

let the said number be x

Nineteeen less than 6 times a number;

6x - 19

equals; 16 more than the number; this is 16 + x

Thus;

6x - 19 = 16 + x

6x-x = 16 + 19

5x = 35

x = 35/5

x = 7

3 0
3 years ago
Javier monthly net income is $1,500. He requests that his bank deposit 1/5 of his monthly earnings into his savings account. how
Harman [31]
1500 * 1/5
1500 * 0.2 = 300
300 * 12 = 3600
Javier contributes $3,600 a year to his savings.
5 0
3 years ago
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