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Alona [7]
4 years ago
14

A university financial aid office polled a random sample of 759 male undergraduate students and 836 female undergraduate student

s. Each of the students was asked whether or not they were employed during the previous summer. 439 of the male students and 394 of the female students said that they had worked during the previous summer. Give a 99% confidence interval for the difference between the proportions of male and female students who were employed during the summer. Step 3 of 4 : Find the value of the standard error. Round your answer to three decimal places.
Mathematics
1 answer:
Bess [88]4 years ago
5 0

Answer:

Step-by-step explanation:

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Calculate the value of T, given S equal 7 and D equal 42
kati45 [8]

Answer:

T=6 if S is equal to 7 you can solve it with 6×7 or 7÷42

Step-by-step explanation:

because 6×7=42

5 0
3 years ago
If you start with 65 milligrams of Chromium 51, used to track red blood cells, which has a half-life of 27.7 days. How long will
Dmitry [639]

Answer:

Half-Life uses the formula N () = Noe # No = Initial Amount time h = length of half-life. Ifyou start with 65 milligrams of Chromium 51,used to track red blood cells, which has half-life of 27.7 days: How long will it take for 80% ofthe material to decay? t= (27.7) h5 (65) (h3) 4= (27.7) h; (05)

Step-by-step explanation:

3 0
3 years ago
3) x2+ y2 - x + 3y - 42 = 0<br> X+y=4
REY [17]

The solution is (-1,5) and (7,-3)

Step-by-step explanation:

The expression is x^{2} +y^{2} -x+3y-42=0 and x+y=4

Using substitution method we can solve the expression.

Let us substitute x=4-y in x^{2} +y^{2} -x+3y-42=0

(4-y)^{2} +y^{2} -(4-y)+3y-42=0

Expanding and simplifying the expression, we get,

\begin{array}{r}{16-8 y+y^{2}+y^{2}-4+y+3 y-42=0} \\{2 y^{2}-4 y-30=0}\end{array}

Let us use the quadratic equation formula to solve this equation,

\begin{aligned}y &=\frac{4 \pm \sqrt{16-4(2)(-30)}}{2(2)} \\&=\frac{4 \pm \sqrt{16+240}}{4} \\&=\frac{4 \pm 16}{4} \\y &=1 \pm 4\end{aligned}

Thus, y=5 and y=-3

Substituting y-values in the equation x+y=4, we get the value of x.

For y=5 ⇒ x=4-5=-1

For y=-3 ⇒ x=4+3=7

Thus, the solution set is (-1,5) and (7,-3)

7 0
4 years ago
maria is bringing her sick dog pedro in for a series of appointments at the veterinary clinic. Her total over the course of trea
Rom4ik [11]
150+30=180x15%=27 total discount
7 0
4 years ago
Analyze the diagram below and complete the instructions that follow.
vlada-n [284]

Answer:

4/5

Step-by-step explanation:

The cosine of the angle is found as the ratio of adjacent to the hypotenuse.

To find it first find the sin 45 = √8/ x. This is equal to 4.

sin 45 = √8/ x

x = √8/ sin 45

x = 4

This means the triangle FHE has side lengths 3, 4,  and 5.

The cosine of FHE will be FH / HE. This is 4/5.

5 0
3 years ago
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