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
elena-s [515]
3 years ago
9

A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35

years) who go to at least 3 concerts a year. Previous studies show that 21% of those people (21 to 35 year olds) interviewed go to at least 3 concerts a year. The researcher wants to be accurate within 1% of the true proportion. Find the minimum sample size necessary.
Mathematics
1 answer:
katrin2010 [14]3 years ago
5 0

Answer:

21378

Step-by-step explanation:

The confidence level is 90%, which gives us a Z of 1.645.

Our equation is (Z^2*p*q)/e^2

(1.645^2*p*(1-.21))/ (.01^2)

E is the error proportion, .01

Q is 1-p or the proportion

P is the pop you need

With this, we can solve

and get p = 21377.5975 and rounded to 21378

You might be interested in
If s(x) = x-7 and f(x) = 4x? – X+3, which expression is equivalent to (tos)(x)?
lesya692 [45]

Answer:

4(x-7)^2-(x-7)+3 (Assuming t is f)

Step-by-step explanation:

Let s(x)=x-7 and t(x)=4x^2-x+3 .

(t o s)(x)=t(s(x))=t(x-7)

Before I continue this means replace the orginal x in t with x-7.

This will then give you

4(x-7)^2-(x-7)+3

4 0
3 years ago
Find x and y<br><br> helppppp !!
Anni [7]

3x + 6 = 48 (alternate angles are equal)

- 6

3x. = 42

÷3

x = 14 degrees

180-48 - 2y + 5y-9 =180

123 + 3y = 180

-123

3y = 57

÷3

y = 19 degrees

Explanation:

To find the last angle on the top straight line, do:

180 - (the 2 given angles).

So, 180 - (3x + 16, which is 48 due to alternate angles being equal). Then, minus the 2y.

(180 - 48 - 2y) & simplify => 132 - 2y

This gives you the equation for the missing angle on our top straight line.

Thus, co-interior angles add to 180. So, we add the new equation (132 - 2y) to 5y - 9.

Simplify

=> 123 + 3y (because - 2+5 =3)

and put it equal to 180. Solve for y

Hope this helps!

7 0
2 years ago
A fish tank has 240240240 quarts of water. Levi adds another 120120120 quarts to the tank. How many gallons of water are in the
ArbitrLikvidat [17]

The 90 gallons of water is in the fish tank if the fish tank has 240 quarts of water. Levi adds another 120 quarts to the tank.

<h3>What is unit conversion?</h3>

It is defined as the conversion from one quantity unit to another quantity unit followed by the process of division, multiplication by a conversion factor.

We have a fish tank has 240 quarts of water.

Levi adds another, 1201 quarts to the tank.

Total water in the tank = 240 + 120 = 360 quartz

To convert quartz to gallon, divide by 4

Total water in the tank = 360/4 = 90 gallons

Thus, the 90 gallons of water is in the fish tank if the fish tank has 240 quarts of water. Levi adds another 120 quarts to the tank.

Learn more about the unit conversion here:

brainly.com/question/14350438

#SPJ1

5 0
2 years ago
A six-foot person walks from the base of a broadcasting tower directly toward the tip of the shadow cast by the tower. When the
mixas84 [53]
B.  \tan{\alpha}= \frac{h}{122+3}

c.  
\tan{\alpha}=\frac{h}{122+3} = \frac{6}{3}&#10;\\&#10;\\ \frac{h}{125} = 2&#10;\\&#10;\\h=250

4 0
3 years ago
Ok can some really help me on this.
Mkey [24]

Answer:

give more information and i will give the right answer

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Pleas help! I do not understand.
    7·1 answer
  • What is the answer???
    15·1 answer
  • -8= -(x+4) plz help I'm not smart and defiantly not good at math
    15·1 answer
  • in Joell's math class there are 8 girls and 17 boys. Based on this ratio how many students would be boys in the total school of
    7·2 answers
  • The sum of three integers is 74. The first integer is twice the second and the third is six more than the second. What are the t
    8·1 answer
  • What is the name of the regular polygon that measures 140゚
    11·1 answer
  • Multiply using cancellation:<br><br> 2/5 x 5/7 =
    15·2 answers
  • Express this number in scientific notation.
    5·1 answer
  • Please helpppppppppp
    5·1 answer
  • HELP ASAP PLEASE!!!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!