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
Bumek [7]
3 years ago
7

Suppose a sample of 200 entrepreneurs will be taken to learn about the most important qualities of entrepreneurs. Show the sampl

ing distribution of p where p is the sample proportion of entrepreneurs whose first startup was at 29 years of age or less. If required, round your answers to four decimal places. np = n(1-p) = E(p) = σ(p) = (b) Suppose a sample of 200 entrepreneurs will be taken to learn about the most important qualities of entrepreneurs. Show the sampling distribution of p where p is now the sample proportion of entrepreneurs whose first startup was at 30 years of age or more. If required, round your answers to four decimal places.
Mathematics
1 answer:
galben [10]3 years ago
4 0

The missing part of the question is highlighted in bold format

The Wall Street Journal reported that the age at first startup for 90% of entrepreneurs was 29 years of age or less and the age at first startup for 10% of entrepreneurs was 30 years of age or more.

Suppose a sample of 200 entrepreneurs will be taken to learn about the most important qualities of entrepreneurs. Show the sampling distribution of p where p is the sample proportion of entrepreneurs whose first startup was at 29 years of age or less. If required, round your answers to four decimal places. np = n(1-p) = E(p) = σ(p) = (b) Suppose a sample of 200 entrepreneurs will be taken to learn about the most important qualities of entrepreneurs. Show the sampling distribution of p where p is now the sample proportion of entrepreneurs whose first startup was at 30 years of age or more. If required, round your answers to four decimal places.

Answer:

(a)

np = 180

n(1-p) = 20

E(p) = p = 0.9

σ(p) = 0.0212

(b)

np =  20

n(1 - p) = 180

E(p) = p = 0.1

σ(p) = 0.0212

Step-by-step explanation:

From the given information:

Let consider p to be the sample proportion of entrepreneurs whose first startup was at 29 years of age or less

So;

Given that :

p = 90%    i.e  p = 0.9

sample size n = 200

Then;

np = 200 × 0.9 = 180

n(1-p) = 200 ( 1 - 0.9)

= 200 (0.1)

= 20

Since np and n(1-p) are > 5 ; let assume that the data follows a normal distribution ;

Then:

The expected value of the sampling distribution of p =  E(p) = p = 0.9

Variance \sigma^2=\dfrac{p(1-p)}{n}

=\dfrac{0.9(1-0.9)}{200}

=\dfrac{0.9(0.1)}{200}

\mathbf{=4.5*10^{-4}}

The standard error of  σ(p) = \sqrt{\sigma ^2}

\mathbf{= \sqrt{4.5*10^{-4}}}

= 0.0212

(b)

Here ;

p is now the sample proportion of entrepreneurs whose first startup was at 30 years of age or more

p = 10%   i.e p = 0.1

sample size n = 200

Then;

np = 200 × 0.1 = 20

n(1 - p) = 200 (1 - 0.1 )  = 180

Since np and n(1-p) are > 5 ; let assume that the data follows a normal distribution ;

Then:

The Expected value of the sampling distribution of p = E(p) = p = 0.1

Variance \sigma^2=\dfrac{p(1-p)}{n}

=\dfrac{0.1(1-0.1)}{200}

=\dfrac{0.1(0.9)}{200}

\mathbf{=4.5*10^{-4}}

The standard error of  σ(p) = \sqrt{\sigma ^2}

\mathbf{= \sqrt{4.5*10^{-4}}}

= 0.0212

You might be interested in
Help me pleaseeee its ALGEBRA
Drupady [299]
11 is 97
12 is -7
13 is 75
14 is 2
15 is -40
I think there is a mistake in 16
17 is 13
18 is 5
3 0
3 years ago
Find a​ point-slope form for the line that satisfies the stated conditions.
san4es73 [151]
Y-6=7(x-3)
The point-slope intercept form of a line that has a slope of 7 and passes through the point (-6,3) is y - 6 = 7 (x - 3)
3 0
3 years ago
Brownies are sold at a bake sale.
Setler [38]

Answer:

$150

Step-by-step explanation:

There are three pans of brownies each containing 25 brownies and 25 × 3= 75.  Each brownie sells for $2. So, 2×75=150.

4 0
1 year ago
What is the interquartile range
motikmotik

<em>Answer:</em>

<em></em>

<em>Step-by-step explanation:</em>

<em>Khan academy huh?</em>

  • <em>put the numbers in order from least to greatest.</em>
  • <em>find the median</em>
  • <em>find the difference between the median and all of the other numbers.</em>

<em></em>

<em></em>

<em>P.S. If you were looking for somebody to tell you the answer don't hold your breath.</em>

8 0
3 years ago
HELP PLEASE!! Brainliest to whoever gets it right.
Aleks04 [339]

Answer:

A

Step-by-step explanation:

i think you might want to wait for other people because i dont  know for sure

4 0
2 years ago
Read 2 more answers
Other questions:
  • Please match this proof​
    6·2 answers
  • Is ABC= A DEF? If so, name the congruence postulate that applies. ​
    8·1 answer
  • Simplify each expression
    9·1 answer
  • Ravi can type 6 words in 4 seconds. how many words can she type in 10 seconds.
    7·1 answer
  • A company that makes trail mix uses 138
    13·1 answer
  • Circle O is shown. Line segments B D and A C intersect at point O. The length of B O is 5. Angle C O D is StartFraction 4 pi Ove
    8·2 answers
  • Triangle ABC has been reflected over the x-axis to create triangle A′B′C′. Which of the following statements is true? B′C′ = 2 A
    9·2 answers
  • Please help idk this ukfjfjfjdjd
    12·1 answer
  • Matthew has recorded the amount he's saved every three months. Months Savings 3 $1,800 6 $3,600 9 $5,400 Christopher saves $550
    10·2 answers
  • Mark needs $26,700 to purchase a boat. How much money will he need to invest today in a savings account earning 4.6% interest, c
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!