1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
gladu [14]
3 years ago
10

Does second-hand smoke increase the risk of a low birthweight? A baby is considered have low birthweight if he/she weighs less t

han 5.5 pounds at birth. According to the National Center of Health Statistics, about 7.8% of all babies born in the U.S. are categorized as low birthweight.
Suspecting that the national percentage is higher than 7.8%, researchers randomly select 1200 babies whose mothers had extensive exposure to second-hand smoke during pregnancy and find that 10.4% of the sampled babies are categorized as low birth weight.
Let p be the proportion of all babies in the U.S. that are categorized as "low birth weight." Give the null and alternative hypotheses for this research question.
1. H 0 : p = 0.078
H a : p ≠0.078
2. H 0 : p = 0.078
H a : p > 0.078
3. H 0 : p = 0.104
H a : p ≠0.104
4. H 0 : μ = .078
H a : μ > .078
Mathematics
1 answer:
marishachu [46]3 years ago
5 0

Answer:

Option 2) Null hypothesis: p = 0.078 , Alternate hypothesis: p > 0.078

Step-by-step explanation:

We are given the following in the question:

According to the National Center of Health Statistics, about 7.8% of all babies born in the U.S. are categorized as low birth weight.

Sample size, n = 1200

p = 7.8% = 0.078

We have to carry a hypothesis test whether national percentage is higher than 7.8% or not.

Thus, we can design the null and the alternate hypothesis

H_{0}: p = 0.078\H_A: p > 0.078

Thus, the correct answer is:

Option 2) Null hypothesis: p = 0.078 , Alternate hypothesis: p > 0.078

You might be interested in
Determine the function which corresponds to the given graph. (3 points) a natural logarithmic function crossing the x axis at ne
quester [9]

Answer:

y =log_e(x+3)

Step-by-step explanation:

It is given that the graph corresponds to a natural logarithmic function.

That means, the function y has a natural log (Log with base e) of some terms of x.

It is given that asymptote of given curve is at x= -3. i.e. when we put value

x= -3, the function will have a value y \rightarrow \infty.

We know that natural log of 0 is not defined.

So, we can say the following:

log_e(x+a) is not defined at x= -3

\Rightarrow x+a =0\\\Rightarrow x = -a

i.e. x =-a is the point where y \rightarrow \infty

a = 3

Hence, the function becomes:

y =log_e(x+3)

Also, given that the graph crosses x axis at x = -2

When we put x = -2 in the function:

y =log_e(-2+3)  = log_e(1) = 0

And y axis at 1.

Put x = 0, we should get y = 1

y =log_e(0+3)  = log_e(3) \approx 1

So, the function is: y =log_e(x+3)

4 0
3 years ago
Round 123.1867 to the nearest thousandth​
zvonat [6]

Answer:

123 is the nearest value

3 0
2 years ago
Read 2 more answers
Y=1/2x<br><br> Y= 4x<br><br> Y= 1/4 x<br><br> Y= 2 x
steposvetlana [31]

It's a line in form y = mx.

Two points:

(0, 0) and (1, 4)

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

Substitute:

m=\dfrac{1-0}{4-0}=\dfrac{1}{4}

Answer: y=\dfrac{1}{4}x

3 0
3 years ago
A golfer’s arm rotates 1/2 of a revolution in 1/10 of a second. If the angular displacement is measured in radians, which statem
anyanavicka [17]
We know that

<span>The angular velocity is 10π rad/sec
step 1
convert to rad/min
1 min-----60 sec
X min----> 1 sec
X=1/60 min
V=</span>10π rad/(1/60)------> V=600 π rad/min

the answer is the option 
<span>D)The angular velocity is 600π rad/min.</span>
6 0
3 years ago
Read 2 more answers
Y=f(x)=2^x find f(x) when x=1
larisa86 [58]
f(x) = 2^x

When x = 1

f(1) = 2^{1} = 2

Answer : f(1) = 2
7 0
2 years ago
Read 2 more answers
Other questions:
  • Factor 8q^2 + 3m + 4qm + 6q=
    14·1 answer
  • Which of the following is the probability that when rolled a die will come up with either a 1 or a 2
    12·1 answer
  • How do I find cubic centimeters in a cube?
    14·1 answer
  • The population of Marshville is loosing 20% of their population of frogs per year. There are currently 900 frogs in Marshville.
    5·2 answers
  • Five pounds is equal to 2.268 kilograms. How many kilograms is 2 pounds?
    8·1 answer
  • The width of a rectangle a is 12 cm less than the length. The perimeter is 156 cm. Which
    7·1 answer
  • GIVING BRAINLY ITS JUST SURFACE AREA PLEASE ANSWER!!!!!
    15·2 answers
  • Pls help no links pls
    13·2 answers
  • Is that the correct answer for it please help me. I want to past my ecam
    12·1 answer
  • The figure below shows a partial graph of two functions, f(x)f(x) and g(x)g(x). f(x)\f(x) is a parabola defined by the quadratic
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!