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OLEGan [10]
3 years ago
15

A very large study showed that aspirin reduced the rate of heart attacks by 44%. A pharmaceutical company thinks they have a dru

g that will be more effective than aspirin, and plans to do a randomized clinical trial to test the new drug. State the null hypothesis and the alternative hypothesis they should use for completing a hypothesis test.
Mathematics
1 answer:
Butoxors [25]3 years ago
6 0

Answer: H_0:\mu=0.44\ ,H_a:\mu

Step-by-step explanation:

Since we have given that

A very large study showed that aspirin reduced the rate of heart attacks by 44%.

we claim that they have a drug that will be more effective than aspirin.

so, our hypothesis would be

H_0:\mu=0.44\\\\H_a:\mu

So, it will be one tail test.

Hence, H_0:\mu=0.44\\\\H_a:\mu

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astraxan [27]

Answer:

24 quarters

Step-by-step explanation:

step 1

Find out the total cost

Multiply the total hours by the unit rate of $2.00 per hour

so

3(2)=\$6.00

step 2

To find out how many quarters Ben needs, divide the total cost by $0.25 (value of one quarter coin)

so

\frac{6.00}{0.25}=24

8 0
3 years ago
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Struggling lol. Any help would be appreciated!
Alekssandra [29.7K]

Answer:

Heptagon = 84 ft²

Octagon  = 186 yd²

Triangle = 48√3 m²

Step-by-step explanation:

\textsf{area of a regular polygon}=\dfrac12ap

where:

  • a = length of apothem
  • p = perimeter

<u>Heptagon</u>

a = 5.0 ft

p = 33.6 ft

⇒ area = 1/2 x 5.0 x 33.6 = 84 ft²

<u>Octagon</u>

a = 7.5 yd

p = 8 x 6.2 = 49.6 yd

⇒ area = 1/2 x 7.5 x 49.6 = 186 yd²

<u>Triangle</u>

Formula for the apothem of an equilateral triangle :

a=\dfrac{s}{2\sqrt{3}}  where s = side length

a = 4, so:

4=\dfrac{s}{2\sqrt{3}}

\implies 8\sqrt{3}=s

Now we know the side length, we can calculate the perimeter (p):

p = 3 x 8√3 = 24√3

⇒ area = 1/2 x 4 x 24√3 = 48√3 m²

8 0
2 years ago
PLZZZZZZ HELP!!!!!!!!!!!!!!!!!!!
ANTONII [103]

Answer:

12 cm

Step-by-step explanation: i think if its not im sorry

8 0
3 years ago
Work out the size of the angle marked x.<br> x<br> 145
dedylja [7]

Answer:

x = 125°

Step-by-step explanation:

The sum of the angles around a point = 360° , then

90 + 145 + x = 360°

235° + x = 360° ( subtract 235° from both sides )

x = 125°

5 0
2 years ago
Factorise this equation 12ax+8bx​
aliya0001 [1]

Answer:

4x(3a+2b)

Step-by-step explanation:

4 0
3 years ago
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