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
Find the required measurements of the following trapezolds.
Aliun [14]

yep answers is 7 my little buddy

7 0
3 years ago
The third angle of an isosceles triangle is 16 o less than the sum of two equal angles. Find
vodka [1.7K]

Answer:    49°, 49°, 82°

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

Let x represent the base angles

then 2x - 16 is the vertex angle.

Triangle Sum Theorem states that the sum of the angles is 180°

(x) + (x) + (2x - 16) = 180

                 4x - 16 = 180

                       4x = 196

                         x = 49

Base angles: x = 49

Vertex angle: 2(49) - 16 = 82

                                   

6 0
3 years ago
Four students took a national standardized test for which the mean was 500 and the standard deviation was 100. If a student’s z-
murzikaleks [220]

z = (x - 500) / 100

1.75 = (x - 500) / 100

175 = x - 500

675 = x

3 0
3 years ago
Read 2 more answers
What is the next number of 1 2 6 17 47 ?<br>and how?!​
geniusboy [140]

2 , 6 , 17 , 47 , <u>108</u> , ...

t(n) = 2n^3 - 8.5n^2 + 15.5n - 7

3 0
3 years ago
What's additive inverse? Like for example this expression 2-16 what's the additive inverse??
Stels [109]

Answer: The multiplicative inverse is 1/2 the addition inverse is -2

Step-by-step explanation:

Since the inverse of multiplication is division, use a fraction. The inverse of addition is subtraction.

4 0
3 years ago
Read 2 more answers
Other questions:
  • Is 13 one tenth of 1.3
    14·2 answers
  • A tester sets 99% confidence limits on a certain statistic. The absolute difference between either limit and the mean is an exam
    14·2 answers
  • How many times can 57 go into 5000?
    11·1 answer
  • X+8&gt;5 is the inequality for my previous question
    12·1 answer
  • Zack had 20 people show up for his first exercise class he had 36 come to second class what is the percent increased
    13·1 answer
  • I NEED HELP ASAPPPPPP
    13·1 answer
  • Meredith needs $399 to buy a tablet computer. She wants
    10·1 answer
  • The difference of six times a number and five is 67. <br> pls include the equation.
    12·2 answers
  • Ivan biked 4 2 3 hours on Monday, 1 1 3 hour on Tuesday, and 2 2 3 hours on Wednesday. What is the total number of hours Ivan sp
    11·1 answer
  • The hypotenuse of a right triangle measures 4 cm and one of its legs measures 3 cm. Find the measure of the other leg. If necess
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!