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
dsp73
3 years ago
10

. According to a study done by researchers at Georgetown University, recent college graduates who majored in architecture have t

he highest unemploy- ment rate, at 13.9%. Arts majors are next, with an 11.1% unemployment rate for recent graduates (source: Georgetown Center on Education and the Workforce). Recent graduates are defined as eligible workers between the ages of 22 and 26. In a random sample of 200 recent architecture graduates, compute the a. expected number of grads who are unemployed. b. variance of the random variable "number of grads who are unemployed
Mathematics
1 answer:
galben [10]3 years ago
8 0

Answer:

The mean is 27.8

The required variance is 23.9358

Step-by-step explanation:

Consider the provided information.

Here the random sample size, n = 200

Unemployment rate is 13.9% = p = 0.139

Part (a) expected number of grads who are unemployed.

Mean = np\\Mean = 200\times 0.139\\Mean = 27.8

Hence, the mean is 27.8

Part (b) variance of the random variable "number of grads who are unemployed.

Variance = np(1-p)\\Variance = 200\times 0.139(1-0.139)\\Variance = 27.8(0.861)\\Variance = 23.9358

Hence, the required variance is 23.9358

You might be interested in
Please help me out I’m struggling
djyliett [7]
I believe the correct answer to your problem is C , you’re welcome
4 0
3 years ago
Read 2 more answers
Suppose P( A) = 0.60, P( B) = 0.85, and A and B are independent. The probability of the complement of the event ( A and B) is: a
diamong [38]

Answer: a. 0.4 × 0.15 = 0.060

Step-by-step explanation: Probability of the complement of an event is the one that is not part of the event.

For P(A):

P(A') = 1 - 0.6

P(A') = 0.4

For P(B):

P(B') = 1 - 0.85

P(B') = 0.15

To determine probability of A' and B':

P(A' and B') = P(A')*P(B')

P(A' and B') = 0.4*0.15

P(A' and B') = 0.06

<u>Probability of the complement of the event is 0.060</u>

5 0
3 years ago
If a line has a slope of 4 and contains the point (-2, 5), what is its equation in point-slope form?
Sveta_85 [38]

Answer:

The equation of the line is y = 4x + 13

Step-by-step explanation:

In this question, we want to write the equation of the line using the point slope form.

Mathematically, the point slope form can be represented as;

(y-y1) = m(x - x1)

where x1 = -2 , y1 = 5 and m which is the slope is 4

Plugging these values into the equation, we have;

(y-5) = 4(x - (-2))

y-5 = 4(x + 2)

y -5 = 4x + 8

y = 4x + 8 + 5

y = 4x + 13

8 0
3 years ago
What is the correct name for a 9-sided polygon?<br><br> decagon<br> octagon<br> nonagon<br> ninagon
Anni [7]

Answer:

nonagon

Step-by-step explanation:

The correct name for a 9-sided polygon is <u>nonagon</u><u>.</u>

4 0
3 years ago
Read 2 more answers
Solve for x 8/x +1/5 = 3/x
HACTEHA [7]

Answer:

I think x=-25

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • How do I find the perimeter of a triangle?
    14·2 answers
  • Rachel states that -5.5 is an integer because it is negative. Is she correct. Why or why not?
    8·2 answers
  • Find the value of x help 10 points
    11·1 answer
  • Find the curved surface area of a cone of radius 7cm and height 24cm
    8·1 answer
  • Which of the following is a true equation?
    10·2 answers
  • Use the distance formula d= √ (x2-x1)^2+(y2-y1)^2 to find the length of the line with endpoints at (1,3) and (3,1)?
    9·1 answer
  • Write an equation that represents the line using exact numbers
    8·1 answer
  • Perform the indicated operation <br> 7 1/8 × 5 2/3
    15·2 answers
  • Please help on a time limt!!
    6·2 answers
  • Please help me this is a post test!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!