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erica [24]
3 years ago
15

Suppose that a population parameter is 0.7 and many samples are taken from the population. If the size of each sample is 50, wha

t is the standard error of the distribution of sample proportions? O A. 0.005 OB. 0.089 O C. 0.065 O D. 0.109​
Mathematics
1 answer:
egoroff_w [7]3 years ago
4 0

Answer:

0.005

Step-by-step explanation:

To get the standard deviation of the sample proportion, we will use this formula - std = √p (1 - p) / n Replace the variables with the given values, then simplify. std

√ 0.7 ×(1 - 0.7) / 50

0.83660027 × 0.3/50

= 0.00501960162

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How do I find the arc from a central angle?
Lesechka [4]

Answer:

Divide the central angle in radians by 2 and perform the sine function on it. Divide the chord length by double the result of step 1. This calculation gives you the radius. Multiply the radius by the central angle to get the arc length.

8 0
3 years ago
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Let a,b,c ∈ Z. Define the highest common factor hcf(a,b,c) to be the largest positive integer that divides a,b and c. Prove that
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21 they have too be right next to each other and threy have too be right

8 0
3 years ago
NEED HELP WITH BOTH PLZ
Natalija [7]
For question 1)
During the 8-9 , Mr hare travel 40miles
For the time 9 onwards they travel concurrently,
Let x be the distance covered by both since they can only meet if they covered the sams distance,
x/50 = x/40 -1 ,where the 1 is the (8-9) 1 hr
x/40 - x/50 = 1
x = 200
Time take by Mr Hare = 200/ 40 = 5
from 8 add 5 hours will be 1
ans is b
2)
during 8- 9 hare travelled 50miles
let x be the distance
x/55= x/50-1
x/50-x/55=1
x=550miles
time taken by hare = 550/50=11 hr
ie when they first meet it will be 7pm
so ans is b 8
7 0
3 years ago
In 15 years lisa will be four times as old as she is now. how old is she now
Eva8 [605]

Answer:

Lisa is 5 years old

Step-by-step explanation:

we can make an equation like

4x=15+x

X can represent Lisa’s current age

Now just solve for X

3x=15

x=5

And we can check

If Lisa is 5 years old now

In 15 years she would be 20

And 20 is 4 times as 5 which Is her current age

So Lisa is 5 years old now.

5 0
3 years ago
Ik the answer but can you explain how <br> Giving brainliest
natka813 [3]

Answer:

4/5 * 3/7

To multiply the fractions, multiply the numerators and denominators separately

4*3/5*7

multiply the numbers

12/5*7

multiply the numbers

12/35

hope that helps

Step-by-step explanation:

8 0
3 years ago
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