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Ierofanga [76]
3 years ago
5

According to the Centers for Disease Control and Prevention, the proportion of U.S. adults age 25 or older who smoke is 0.22. A

researcher suspects that the rate is lower among U.S. adults 25 or older who have a bachelor's degree. She took a random sample of 275 U.S. adults 25 or older who have a bachelor's degree, and the proportion of smokers in her sample is 0.18. What is the null hypothesis in this case? What is the alternative hypothesis in this case?
Mathematics
1 answer:
Dmitrij [34]3 years ago
3 0

Answer: Null hypothesis :H_0:\ p=0.22

Alternative hypothesis : H_a:\ p

Step-by-step explanation:

Given claim : The proportion of U.S. adults age 25 or older who smoke : p=0.22

A researcher suspects that the rate is lower among U.S. adults 25 or older who have a bachelor's degree. i.e. p

Since the null hypothesis is a fact checked by the researcher or the experimenter that always contains a equals to sign.

∴ Null hypothesis :H_0:\ p=0.22

Alternative hypothesis : H_a:\ p

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Examine the following diagram:
Lisa [10]

Answer:

Its C: 41°

Step-by-step explanation:

it was right on edg :)

6 0
3 years ago
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I chose the lion (50 mph) and the elephant, (25 mph), i need help writing a system of two linear equations showing the distance
IgorC [24]
So basically sense the lion is 50 and the elephant is 25 that’s half of 50 so if you find the lion’s distance you divide it by to and that’s the answer
4 0
3 years ago
If a bacteria population starts with 80 bacteria and doubles every three hours, then the number of bacteria after t hours is n =
Thepotemich [5.8K]

Answer:

f^{-1}(x)=3\frac{ln(\frac{t}{80})}{ln(2)}

It will take 20.9 hours to reach 10000

Step-by-step explanation:

f(t)=80(2)^{\frac{t}{3}}

To find inverse of the function , replace f(x) with y

y=80(2)^{\frac{t}{3}}

swap the variables

t=80(2)^{\frac{y}{3}}

solve the equation for y

t=80(2)^{\frac{y}{3}}\\\\\frac{t}{80} =(2)^{\frac{y}{3}}

take ln on both sides

ln(\frac{t}{80} )= \frac{y}{3} ln(2)\\\\\frac{ln(\frac{t}{80} }{ln(2)} =\frac{y}{3}\\3\frac{ln(\frac{t}{80} }{ln(2)} =y

the inverse function is

f^{-1}(x)=3\frac{ln(\frac{t}{80})}{ln(2)}

for part b plug in 10000 for t in f^-1(x)

f^{-1}(10000)=3\frac{ln(\frac{t}{80} }{ln(2)} \\f^{-1}(10000)=3\frac{ln(\frac{10000}{80} }{ln(2)} \\=20.89

It will take 20.9 hours to reach 10000

7 0
3 years ago
You spend $24 on 21 pounds of apples. You purchase 2 pounds of golden apples for $1.25 per pound. Red delicious apples cost $1.0
kow [346]

Answer:

2 pounds of Golden Apples

5 pounds of Empire Apples

14 pounds of Red Apples

Step-by-step explanation:

2 pounds of golden apple for 1.25 per pound = 2 * 1.25 = $2.50 spent

24 - 2.5 = $21.5 left for red apples and empire apples

Also, 2 pounds of 21 pounds gone, so 19 pounds left

Now,

let number of red apples be r and number of empire apples be e

So, we can write:

r + e = 19  [also r = 19 - e]

and

1r + 1.5e = 21.5

Putting #1 in #2 equation, we solve for e:

1r + 1.5e = 21.5\\1(19-e)+1.5e=21.5\\19-e+1.5e=21.5\\0.5e=2.5\\e=5

Thus, r = 19 - e, 19 - 5 = 14

So,

2 pounds of Golden Apples

5 pounds of Empire Apples

14 pounds of Red Apples

3 0
3 years ago
Diane's height and weight needs to be completed on her chart.what height is Diane?
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We are not able to know her height or her weight, was there a chart that came with your questions? Or even answers to choose from? 
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