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
rusak2 [61]
3 years ago
13

*NEED HELP QUICKLY*

Mathematics
1 answer:
dybincka [34]3 years ago
7 0

Answer: undefined

Step-by-step explanation:

I think im not sure tho

You might be interested in
Sven determined that the x-coordinate is approximately 3.6 because the point is closer to 4 than 3 and seems to be a little more
mezya [45]

The y-coordinate is between -1 and -2. It is close to halfway between -1 and -2, but it is a little less than halfway.

Answer: Choice B.   y \approx -1.4

5 0
3 years ago
Read 2 more answers
At what point do the graphs of 9x - 2y = 30 and x + 2y = 10 intersect
strojnjashka [21]

Answer:

(4,3)

Step-by-step explanation:

4 0
3 years ago
Starting in the 1970s, medical technology allowed babies with very low birth weight (VLBW, less than 1500 grams, about 3.3 pound
cluponka [151]

Answer:

The test statistic value using the VLBW babies as group 1 is z=-2.76±0.01 and the P-value for the test (±0.0001) is 0.0030.

Step-by-step explanation:

This is a hypothesis test for the difference between proportions.

The claim is that the proportion of persons with normal birth weight that graduates from high school is significantly greater than the proportion of persons with very low birth weight that graduates from high school.

Then, the null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2> 0

The significance level is 0.05.

The sample 1 (VLBW group), of size n1=244 has a proportion of p1=0.77049.

p_1=X_1/n_1=188/244=0.77049

The sample 2 (control group), of size n2=247 has a proportion of p2=0.79757.

p_2=X_2/n_2=197/247=0.79757

The difference between proportions is (p1-p2)=-0.02708.

p_d=p_1-p_2=0.77049-0.79757=-0.02708

The pooled proportion, needed to calculate the standard error, is:

p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{188+197}{244+247}=\dfrac{385}{491}=0.988

The estimated standard error of the difference between means is computed using the formula:

s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.988*0.012}{244}+\dfrac{0.988*0.012}{247}}\\\\\\s_{p1-p2}=\sqrt{0.00005+0.00005}=\sqrt{0.0001}=0.0098

Then, we can calculate the z-statistic as:

z=\dfrac{p_d-(\pi_1-\pi_2)}{s_{p1-p2}}=\dfrac{-0.02708-0}{0.0098}=\dfrac{-0.02708}{0.0098}=-2.76

This test is a left-tailed test, so the P-value for this test is calculated as (using a z-table):

P-value=P(t

As the P-value (0.0030) is smaller than the significance level (0.05), the effect issignificant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the proportion of persons with normal birth weight that graduates from high school is significantly greater than the proportion of persons with very low birth weight that graduates from high school.

3 0
3 years ago
Hey! whats 12.5% of 240km?
JulijaS [17]

Answer:

= 30 km

Step-by-step explanation:

12.5 * 240/100

<em><u>= 30 km</u></em>

6 0
3 years ago
Read 2 more answers
Use a calculator to find the missing side length. Tell whether the side lengths form a Pythagorean Triple.
12345 [234]
Pythagorean theorem: a^2 + b^2 = c^2
The hypotenuse is always the c in the equation.  
If the two side lengths they gave you are not the hypotenuse, then enter
4.5^2 + 5.6^2 in the calculator, then find the square root of that. :-)
5 0
3 years ago
Other questions:
  • You want to buy a custom bike for $1238.50. The sales tax is 4%. What is the total price you will pay for the bike?
    12·2 answers
  • A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes.
    15·1 answer
  • Please answer this correctly
    10·2 answers
  • Find the volume of a cylinder with 14 inches height and 10.2 inches radius
    13·1 answer
  • The bank statement of July 31 for Savon Co. showed a balance of $6,008.10, and the checkbook showed a balance of $1,900.40. The
    11·2 answers
  • PLEASE ANSWER ASAP!<br> 2(h -3.5) = -11<br> what is h?
    6·2 answers
  • I need someone to teach me the tricks of linear equation​
    8·2 answers
  • The cost of having photos taken includes a sitting fee and $12 for each portrait. The cost of 3, 6, and 9 photos respectively is
    6·2 answers
  • K12 I will mark Brainlest
    9·1 answer
  • Hey guys need help here
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!