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
3h - j when h = 8 and j = 11<br> plzzz help
AURORKA [14]

Answer:

13

Step-by-step explanation:

3h - j

3(8) - 11

24 - 11

13

8 0
3 years ago
(04.07) Julie is at the store buying groceries. She needs to get a quart of orange juice and some peaches. The quart of orange j
hjlf

Answer:

f(x) is the total cost and x is the number of peaches.

Step-by-step explanation:

We know that each peach costs $0.75.  This means the expression 0.75x represents the total cost of peaches; this makes x represent the number of peaches.

We also know that $2.25 is the cost of juice.  Adding it to the cost of peaches gives us the total cost; this means f(x) represents the total cost.

5 0
3 years ago
A runner starts at the 2.0 meter line and runs to the 8.0 meter line in 2.4 seconds. What was their average velocity?
Ganezh [65]

Answer:

the averege is 2.34

duh

Step-by-step explanation:

4 0
2 years ago
What is the exact volume of the cone?
ipn [44]
C hope that helped have a great time I love it you can do
7 0
3 years ago
Read 2 more answers
In a class, 40% of the students are boys. There are 22 boys in the class. How many students are in the class?
Readme [11.4K]
40/100 = 22/x
40x = 2200
x = 55
There are 55 students in this class.

6 0
2 years ago
Other questions:
  • Given that 5W = 2P + 3R find the value of P when W = 4 and R = −4
    15·1 answer
  • For each pair of shapes, decide whether or not Shape A is congruent to Shape B. Explain your reasoning.
    15·1 answer
  • I just need help at this point.
    7·2 answers
  • Find the slope given the points (3,18) and (0,18).
    10·1 answer
  • Amy bought 2.4 pounds of apples for 1.65 per pound what is the total cost of the apples
    8·1 answer
  • Simplify hariy fractions
    9·1 answer
  • How do you know that 21 over 30 is greater than 2 over 3
    11·2 answers
  • <img src="https://tex.z-dn.net/?f=%284%2B%5Csqrt%7B-7%7D%29%20%283%2B%5Csqrt%7B-7%7D%29" id="TexFormula1" title="(4+\sqrt{-7}) (
    12·2 answers
  • Obtain the derivative of y=2x^2​
    14·2 answers
  • . Larry solved this equation. 3(2-3)= x Which representation could Larry have used to solve this equation?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!