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3 years ago

Can anyone help me on this ?

Mathematics

1 answer:

andrew-mc [135]3 years ago

8 0

Answer:

37.9

Step-by-step explanation:

21.600/21.6+16.3=37.9

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A pharmaceutical company proposes a new drug treatment for alleviating symptoms of PMS (premenstrual syndrome). In the first sta

Akimi4 [234]

Answer:

95% confidence interval for p, the true proportion of all women who will find success with this new treatment is [0.238 , 0.762].

Step-by-step explanation:

We are given that a pharmaceutical company proposes a new drug treatment for alleviating symptoms of PMS (premenstrual syndrome).

In the first stages of a clinical trial, it was successful for 7 out of the 14 women.

Firstly, the pivotal quantity for 95% confidence interval for the true proportion is given by;

P.Q. = $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of women who find success with this new treatment = $\frac{7}{14}$ = 0.50

n = sample of women = 14

Here for constructing 95% confidence interval we have used One-sample z proportion statistics.

So, 95% confidence interval for the true proportion, p is ;

P(-1.96 < N(0,1) < 1.96) = 0.95 {As the critical value of z at 2.5%

level of significance are -1.96 & 1.96}

P(-1.96 < $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < 1.96) = 0.95

P( $-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < ${\hat p-p}$ < $1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ) = 0.95

P( $\hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < p < $\hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ) = 0.95

95% confidence interval for p = [ $\hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ , $\hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ]

= [ $0.50-1.96 \times {\sqrt{\frac{0.50(1-0.50)}{14} } }$ , $0.50+1.96 \times {\sqrt{\frac{0.50(1-0.50)}{14} } }$ ]

= [0.238 , 0.762]

Therefore, 95% confidence interval for p, the true proportion of all women who will find success with this new treatment is [0.238 , 0.762].

4 0

3 years ago

Ive dont most of it on my own but need help solving the last bit thats left. Its inequality symbols

Gelneren [198K]

True or false?
ok, so just use your head and use this simple memory tool
for remembering inequalities, the aligator eats the bigger number
x>y means x is biger than y
x<y means x is smaller than y or y is bigger than x

remember: the farther to the right a number is, the bigger it is
8<9
and
-10<-3 since -3 is farther to right than -10

so see them
b. 5>7, duh, false
c. 15≥17, are you kidding me, false
d. true
e. nay, no negative number is ever greater than a positive, false
f. true, -2 is farther to the right than -13 is
g. x>4, x is any number bigger than 4, not including 4
h. x is any number bigger than 8, not including 8
i. x is less than or equal to -4, so it can be -5, or even -4

7 0

3 years ago

Find the length of AC.

saw5 [17]

Answer:

4.3

Step-by-step explanation:

6.8^2-5.3^2=x^2

AC=4.3

3 0

3 years ago

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Find the angle measures for this isosceles triangle.

rewona [7]

Answer:

Step-by-step explanation:

3p+6p+6p=180°

15p=180

p=12

3p=12×3=36°

6p=12×6=72°

4 0

3 years ago

A2(5x – 3) = 24 b) 5(2x + 1) = 50

Murljashka [212]

Use “Photo math” in the app store. It’ll help you with all those type of problems:)

3 0

3 years ago

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