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
denis23 [38]
3 years ago
15

Help...........................plzplzplzplz

Mathematics
1 answer:
Ann [662]3 years ago
8 0
2560 hairs is your answer
You might be interested in
Please help me asap!!!
Westkost [7]

Answer: immma guess that its c

super sorry if im wrong

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The distance from P to Q is four times the distance from Q to R. The distance from p to r is 120 metres. What is the distance fr
Leviafan [203]
|----------------------------------120 m ------------------------------|

|--------------|--------------|--------------|--------------|--------------|
P                                                                 Q               R

Distance from P to R = 120m

120 ÷ 5 = 24m

The distance from Q to R is 24m.
4 0
3 years ago
Read 2 more answers
A doctor released the results of clinical trials for a vaccine to prevent a particular disease. In these clinical​ trials, 200,0
CaHeK987 [17]

Answer:

1) No, there is  not  enough evidence to support the claim that the vaccine was effective (P-value=0.104) .

The null and alternative hypothesis are:

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

being the subindex 1 for the experimental group and subindex 2 for the control group.

2) Test statistic z=-1.26

Step-by-step explanation:

This is a hypothesis test for the difference between proportions.

The claim is that the vaccine was effective.

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 0.01.

The sample 1 (experimental group), of size n1=100000 has a proportion of p1=0.0002.

p_1=X_1/n_1=21/100000=0.0002

The sample 2 (control group), of size n2=100000 has a proportion of p2=0.0003.

p_2=X_2/n_2=30/100000=0.0003

The difference between proportions is (p1-p2)=-0.0001.

p_d=p_1-p_2=0.0002-0.0003=-0.0001

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

p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{21+30}{100000+100000}=\dfrac{51}{200000}=0.00026

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{0.00026*0.99974}{100000}+\dfrac{0.00026*0.99974}{100000}}\\\\\\s_{p1-p2}=\sqrt{0+0.0000000025}=\sqrt{0.0000000051}=0.000071

Then, we can calculate the z-statistic as:

z=\dfrac{p_d-(\pi_1-\pi_2)}{s_{p1-p2}}=\dfrac{-0.00009-0}{0.000071}=\dfrac{-0.00009}{0.000071}=-1.26

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

P-value=P(z

As the P-value (0.104) is bigger than the significance level (0.01), the effect is not significant.

The null hypothesis failed to be rejected.

There is  not  enough evidence to support the claim that the vaccine was effective.

6 0
3 years ago
What number is in between 375 and 400?
Georgia [21]
376,377,378,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,400
just kidding its 396.5
hope this helped
7 0
3 years ago
Pweeze help and i will give brainliest UwU &lt;3
bazaltina [42]

Answer:

See below for answers

Step-by-step explanation:

1st blank: 2*2*2*2*2*2*2

2nd blank: 2

3rd blank: 7*7

4th blank: 7

5th blank: no

6th blank: doesn't equal

4 0
2 years ago
Other questions:
  • Katy is 1m 18 cm tall. Beth is 112 cm tall How much taller is Katy​
    6·1 answer
  • For accounting purposes, the value of assets (land, buildings, equipment) in a business depreciates at a set rate per year. The
    5·2 answers
  • Solve the following equations for x (5 points each). (a)-3x+10=34
    10·1 answer
  • a box contains 22 tickets, adult tickets are 5.00$ each and child tickets are 3.00$ each. the total value of tickets is 74$. how
    9·1 answer
  • WILL GIVE BRAINLIEST!!! Show your work please!!
    10·1 answer
  • The number of 5p, 10p, and
    14·1 answer
  • Write the equation of a line in slope-intercept form with a slope of 2 and
    7·1 answer
  • Which of the points shown below are on the line given by the equation y = 2x?
    5·1 answer
  • A student simplified the rational expression
    12·2 answers
  • In a closed box there are 7 blue balls and 5 red balls. Randomly pick one from the box one at a time until the ball is green, th
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!