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Musya8 [376]
2 years ago
14

12 Over a period of several years in a sleep-therapy clinic, the average latency to fall asleep for adult males, age 20-30, has

been found to be 335 seconds. In a study of the effectiveness of hypnotic therapy, 30 males of the appropriate age are given the treatment and then their latency to fall asleep is measured.
The results are a mean latency of 283.7, with a variance of 5,756.26 seconds. Test the hypothesis that hypnotic therapy has no effect on sleep latency. Use an a level of .05 and a nondirectional test.
Mathematics
1 answer:
Volgvan2 years ago
8 0

Answer:

gsgshzbshdbbdbfnsjjncnsnfndnebfndbfndnbvndnenjdjfnxjrjcndjfjcnndjfndjejfjekfjndnfjdndnfjdncjcnndnxbvndncbcjfnfxnndsnsnfcn

xnbdjendnfjnxnrnxzkksvixibdbwbkchfjenz

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What is the value of x?
Andrei [34K]

Answer:

x=2

Step-by-step explanation:

We will use the secant-secant Formula:

(whole secant) x (external part) =         (whole secant) x (external part)

(1+x+4) * (x+4) = (11+x+1) * (x+1)

Combine like terms

(x+5) (x+4) = (x+12) (x+1)

FOIL

x^2 + 4x+5x + 20 = x^2 +  x+ 12x + 12

Combine like terms

x^2 + 9 x + 20 = x^2 + 13 x + 12

Bring everything to the left

x^2 + 9 x + 20- (x^2 + 13 x + 12) = x^2 + 13 x + 12-( x^2 + 13 x + 12)

x^2 + 9 x + 20- (x^2 + 13 x + 12) =0

Distribute the minus sign

x^2 + 9 x + 20- x^2 - 13 x - 12 =0

Combine like terms

-4x +8 = 0

Subtract 8 from each side

-4x+8-8=0-8

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Divide each side by -4

-4x/-4 = -8/-4

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6 0
3 years ago
(9u+w)^2<br> (use foil).................
Yanka [14]

Answer:

Step-by-step explanation:

(9u + w)(9u + w)

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o: 9u * w

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Result

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8 0
3 years ago
Find the missing length.
algol [13]

Answer:

3 \sqrt{13}

Step-by-step explanation:

{6}^{2}  +  {9}^{2}

\sqrt{117}

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6 0
3 years ago
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What is this expression in simplest form?
gayaneshka [121]

Answer:

A. 1÷(X+1) (x-2)

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2 years ago
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