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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

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I also need help with this math problem.
vazorg [7]

Answer:

absolute devlation is

1, 1 + 5+9,4+1, 2+8,1+4,3

Step-by-step explanation:

=4,9

95,5 -> 105 3

have a nice day

8 0
2 years ago
Select the correct answer.
lukranit [14]

Answer:

53*15*12=9540

Step-by-step explanation:

its just 53 times 15 times 12 for all the possibilities.

Say the first football player was picked, same with the first baseball player, and the first basketball player were all picked, then another possiblity would be the first football player, the second baseball player, and the first basketball player, here is a numerical example.

Football            Baseball             Basketball

     1                         1                             1  

     1                         2                            1

     1                         2                            2

     1                         2                            3

     1                         2                            4

and so on including all the patterns it would be 9540 possibilities

8 0
3 years ago
Question 6
oee [108]

Answer:

The answer is 200km

Step-by-step explanation:

250\5=50,50×4=200

7 0
3 years ago
An airplane is flying from New York City to Los Angeles. The distance it travels in miles d, is related to the time in seconds,
34kurt

Answer:

A. 0.15

B. 0.45

C. 85

Step-by-step explanation:

Given that:

Equation to represent the relation between distance, d in miles and time t in seconds:

d=0.15t

<em>A. </em>

To find: The speed of airplane in miles per second.

Formula for speed is given as:

Speed = \dfrac{Distance}{Time}

Here, we will have to find the value of \frac{d}{t}.

Dividing the given equation by t, we get:

\dfrac{d}{t}=0.15

d is in miles and t is in seconds.

Therefore, the answer is <em>0.15</em>.

<em>B.</em>

Distance traveled in 30 seconds.

Given that: t = 30 seconds

To find: d = ? in miles

d = 0.15\times 3 = 0.45

<em>C.</em>

The time taken to travel a distance of 12.75 miles.

Given that : d =12.75\ miles

To find: t = ? seconds

12.75 = 0.15t\\\Rightarrow t = \dfrac{12.75}{0.15}\\\Rightarrow \bold{t = 85}

3 0
3 years ago
For the sequence below, identify the type of sequence and important features
Romashka-Z-Leto [24]
Hey there!

The answer would be B. Geometric sequence with an initial value of 7 and a growth factor of 2. The first, or initial value is 7 in the sequence and each number is multiplied by 2 as the sequence goes on.


Hope this helps !
7 0
4 years ago
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