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
aev [14]
3 years ago
7

A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 35 adult Americans an

d asks them whether or not they support the proposed changes. To say that the distribution of the sample proportion of adults who respond​ yes, is approximately​ normal, how many more adult Americans does the researcher need to sample in the following​ cases?
(a) 20% of all adult Americans support the changes(b) 25% of all adults Americans support the changes
Mathematics
1 answer:
Liula [17]3 years ago
6 0

Answer:

Adult required in the case of “a” 28 and in the case of “b” the adult requirement is 19.

Step-by-step explanation:

(a) The percentage of adult that support the change is 20 percent.

Now calculate the number of adult required.

Given p = 0.20

Use the below condition:

np(1 – p) \geq 10 \\n \times 0.20 (1 – 0.20) = 10 \\n = 63 round off

Since 35 adults are already there so required adults are 63 -35 = 28

(b) The percentage of adult that support the change is 25 percent.

Now calculate the number of adult required.

Given p = 0.25

Use the below condition:

np(1 – p) \geq 10 \\n \times 0.25 (1 – 0.25) = 10 \\n = 54 (round off)

Since 35 adults are already there so required adults are 54 -35 = 19 .

You might be interested in
Tucker drove at a speed at 45 miles per hour. How many feet per second was tucker traveling? (Thanks in advanced)
Tpy6a [65]
3 ft/s
__________________
6 0
3 years ago
Read 2 more answers
What is 2x + 3y< =543 +3x> 3,456,789<12+12+12+12+12+12+12+12+18+19+10+19
artcher [175]

Answer:

65.434

Step-by-step explanation:

4 0
2 years ago
What is the opposite of 3.75 on a number line?​
vodomira [7]

Answer:

-3.75

Step-by-step explanation:

the opposite changes the sign from positive to negative, so the opposite of 3.75 would be -3.75

5 0
2 years ago
Read 2 more answers
Find the length of WR<br><br>If M &lt;WCR = 49 and CR = 7. What is WR
UkoKoshka [18]
We know that
if ∠WCR=49°
then 
measure arc WR=49°-------> by central angle

circumference C=2*pi*r
for r=7 in
C=2*pi*7-----> 43.96 in

if 360°(full circle) has a length of----------> 43.96 in
 49°---------------> x
x=49*43.96/360-----> x=5.98 in

alternative method 
applying the formula
L=(∅/360°)*2*pi*r
where
∅ is the angle in degrees
r is the radius
L=(49°/360°)*2*pi*7------> L=5.98 in

the answer is
5.98 in 
4 0
3 years ago
Read 2 more answers
Need help with number 3
MAVERICK [17]
Vertical angles are always equal. The vertical angles are the ones opposite each other. Therefore x would equal 40.
5 0
2 years ago
Other questions:
  • IMPORTANT! WILL VOTE BRAINLIEST!!!
    9·1 answer
  • Sally counts 7 stars. mike counts I more star than Dally. How many stars do they count in all?
    9·2 answers
  • 9/10 divided by (-3/5) as a mixed number
    7·1 answer
  • 3) 2(x - 10) + 1 = 60
    11·1 answer
  • DIRECTIONS: Enter your answer as an ordered pair: (? , ?)
    7·1 answer
  • 2. Solve the quadratic by taking square roots. Write your answer with no spaces as x=a,-a where a and -a are the values you foun
    13·1 answer
  • Ryan has a box of markers. It has 45 markers that are some shade of blue. The blue markers represent 25% of the total markers in
    6·2 answers
  • Brett rolled a pair of number cubes 36 times. He rolled a sum of 7 for 12 of
    7·1 answer
  • Solve<br> Y = -1/2 (-2) + 2
    14·2 answers
  • Please help, image below. Thank you!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!