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
Natali5045456 [20]
3 years ago
9

Avin and andrea are two of the children in the jones family gavin has as many brothers as sister andrea has twice as many as man

y brothers as sisters. how many children are in the jones family
Mathematics
1 answer:
nalin [4]3 years ago
5 0
I think is 8
I hope this work for u
You might be interested in
A research group wants to know if the online platform to play Settlers of Catan is being accessed more after the stay at home or
Gre4nikov [31]

Answer:

a) The P-value is 0.

At a significance level of 0.05, there is enough evidence to support the claim that the online platform was accessed significantly more so than before the stay at home order.

b) Effect size d = 0.77

Medium.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the online platform was accessed significantly more so than before the stay at home order.

Then, the null and alternative hypothesis are:

H_0: \mu=1000\\\\H_a:\mu> 1000

The significance level is 0.05.

The sample has a size n=108000.

The sample mean is M=1378.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=489.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{489}{\sqrt{108000}}=1.488

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{1378-1000}{1.488}=\dfrac{378}{1.488}=254.036

The degrees of freedom for this sample size are:

df=n-1=108000-1=107999

This test is a right-tailed test, with 107999 degrees of freedom and t=254.036, so the P-value for this test is calculated as (using a t-table):

\text{P-value}=P(t>254.036)=0

As the P-value (0) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

At a significance level of 0.05, there is enough evidence to support the claim that the online platform was accessed significantly more so than before the stay at home order.

The effect size can be estimated with the Cohen's d.

This can be calculated as:

d=\dfrac{M-\mu}{\sigma}=\dfrac{1378-1000}{489}=\dfrac{378}{489}=0.77

The values of Cohen's d between 0.2 and 0.8 are considered "Medium", so in this case, the effect size d=0.77 is medium.

5 0
3 years ago
A lab technician has to fill the tank given below. <br> Find it’s volume .
wel

Answer:

The volume of the cylinder shown in the figure is 628 cube meters

Step-by-step explanation:

Given figure is about cylinder

The height of the cylinder = h = 8 meters

The radius of the base of cylinder = r = 5 meters

Now, let The volume of cylinder = V m³

So, The volume of cylinder is given as V = \pi×r²×h

where r is the radius of its base

And h is the height of cylinder

The value of  \pi = 3.14

So, V =  \pi × r² × h

Or, V = 3.14 × (5)² × 8

Or, V =  3.14 × 25 × 8

or, V = 628 m³

So, The volume of cylinder = V  = 628 m³

Hence The volume of the cylinder shown in the figure is 628 cube meters  Answer

6 0
3 years ago
The population of Clarksville is about 6000 people. What is the population written as a whole number multiplied by a power of te
padilas [110]
I don't understand what you mean but this might be the answer
{6}^{100}
7 0
3 years ago
Abc - ab =<br> a = 2, b = 1, c = 3
Gelneren [198K]

Answer:

4

Step-by-step explanation:

(2x1x3) - (2x1) =

6 - 2 = 4

7 0
3 years ago
MATH HELP
Veronika [31]
The remaining area is 20% of the previous area.

Hope this Helps!
4 0
3 years ago
Read 2 more answers
Other questions:
  • If the x-intercept of a line is -3 and the y-intercept of this line is 8, what is the slope of this line?
    5·1 answer
  • Solve for b in the literal equation y = 11x + 11b
    15·2 answers
  • McDonald's has about 210,000 managers and each makes on average 39,000 dollars per year. How much money does McDonald's spend on
    9·1 answer
  • Solve 5x2 = −30x − 65.<br><br> x = −3 ± 2i<br> x = −3 ± 4i<br> x = −6 ± 2i<br> x = −6 ± 4i
    15·1 answer
  • Mark scored three times as many points as justin.write and algebraic expression to represent the number of points mark scored. e
    8·1 answer
  • Princess Poly claims that the equation (3x−4i)(7x−8)(3x+4i)=0 has three roots, a real root and a complex root with a multiplicit
    8·1 answer
  • Han rulers supported the idea of a peaceful society brought about by mutual respect among all people known as
    8·2 answers
  • Complete the proof of the polynomial identity. *help please draw a line from the correct answer to the correct blank*
    15·1 answer
  • Which number line best represents the solution to the Equation -8+ R = -2​
    6·1 answer
  • Which of the following represents y &lt; 2x - 3?<br><br><br> help a girl out please
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!