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
marishachu [46]
3 years ago
5

) In 2005, the Health Department in Marion County, Indiana measured the heights and weights of 90,147 school-age children, allow

ing exact determination of their BMIs. Among the chil-dren participating in the study, 22% were considered obese. Does this indicate that the true obesity rate for children in Marion County is different from the national average
Mathematics
1 answer:
Lena [83]3 years ago
3 0

Answer:

Since the calculated z=40  falls in the critical region this indicates that the true obesity rate for children in Marion County is different from the national average at the 0.05 significance level. We reject the null hypothesis that population proportion is 0.17.

Step-by-step explanation:

The national average is 17% .The z proportional hypothesis test is used.

1) Let the null and alternate hypothesis be

H0: p =0.17

against the claim

Ha: p ≠ 0.17

Choose the significance level ∝= 0.05

The critical region is z > 1.96  and Z <- 1.96 because  it is two tailed test.

Computing

z= p^-p / sqrt [pq/n]

Z= 0.22-0.17/ √0.17*(1- 0.17)/90147

z= 39.965

Since the calculated z=40  falls in the critical region this indicates that the true obesity rate for children in Marion County is different from the national average at the 0.05 significance level. We reject the null hypothesis that population proportion is 0.17.

You might be interested in
If the radius of a circle is 2.6 inches, what is the diameter of the circle?
ch4aika [34]

Answer:

5.2

Step-by-step explanation:

radius is half the diameter

8 0
3 years ago
Read 2 more answers
Find sin(u/2) if tan(u)=-7.721 and u is in quadrant 4
morpeh [17]

Answer:

.6601

Step-by-step explanation:

to find u, which we assume is an angle of course, we can take arctan of both sides.  so arctan(-7.721) = -1.4420.  this angle is in quadrant 4, but it is not in the range.  In this instance you just go around the circle again, or add 2pi, which gets us 4.8412.  You can check and you get the same answer if you take the tangent of either.

So now we have a number in the appropriate range  in the appropriate quadrant.  That means we have the correct angle.  The question asks what is sine of that angle cut in half.  so sin(4.8412/2), which gets you your answer.  let em know if something didn't make sense.  

7 0
3 years ago
What is 2.346 as a percent
34kurt

Answer:

Step-by-step explanation:

to turn a decimal to a percent, multiply by 100.....or if there is a decimal in there, start from the decimal and just move 2 spaces to the right.

2.346 = 234.6%

and just so you know, to turn a percent to a decimal, divide by 100...or move the decimal point 2 spaces to the left

6 0
3 years ago
I GIVE BRAINLIEST PLEASE EXPLAIN<br> What is the square root of 121
andre [41]
The square root of 121 is 11 because 11 times 11 is 121.
6 0
3 years ago
Read 2 more answers
Solve for the value of X.
Mkey [24]
The answer is 40°
i will tell you how,
Total angle sum of any triangle is 180°
∠A + ∠B  + ∠E = 180°
70° + 80° + ∠E = 180°
solve for ∠E
∠E = 30°
Now solve use ∠BDE,
∠B + ∠D + ∠E = 180°
20° + 90° + 30° + x = 180°           (in triangle DEB, ∠E = 30 + x ) (∠D is 90°)
solve for x
there fore, x = 40° 
6 0
3 years ago
Other questions:
  • The graph of sqrt of x has symmetry but the graph of - square root x does not true or false
    5·1 answer
  • Please this is so urgentttt
    11·1 answer
  • 1, 4, 16, 64, 256
    15·2 answers
  • What are the decimals 7.55, 7.8, 7.505, and 7.5531 in order from least to greatest
    5·1 answer
  • 25 points!!! Write the coordinates of the point that is shown in the equation. y + 5 = -2(x - 4)
    10·1 answer
  • Please solve this i really need the help <br> Y-2 = ½(X-3)
    14·1 answer
  • Jake bought some shirts for $6 each. Andy bought some shirts for $8 each. The boys spent the same amount of money on shirts. Wha
    10·1 answer
  • PLZZ HELP ME I’LL MARK AS BRAINLIESTTTT!!!!
    8·1 answer
  • Find the equation of a line that passes through the points (1,-3) and (3,-4).
    9·2 answers
  • It costs 30 dollars per month for a cell phone plus 10 dollars for every GB of data.Which expression can be used to represent th
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!