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
lyudmila [28]
3 years ago
12

The Census Bureau reports that 82% of Americans over the age of 25 are high school graduates. A survey of randomly selected resi

dents of certain county included 1110 who were over the age of 25, and 871 of them were high school graduates.Find the mean and standard deviation for the number of high school graduates in groups of 1110 Americans over the age of 25.
Mathematics
1 answer:
mihalych1998 [28]3 years ago
6 0

Answer:

Mean = 910.2

Standard deviation = 12.8

Step-by-step explanation:

82% over the age of 25 are high school graduates.

A survey randomly selected students of certain country included 1110 who were over the age of 25 and 871 of them were high school.

n = 1110

p = 82% = 0.82

q = 1 - 0. 82

q = 0.18

Mean = np

= 1110*0.82

= 910.2

Standard deviation = √npq

= √ 1110*0.82*0.18

=√163.836

= 12.8

You might be interested in
How do you add with a negative number?
Cloud [144]
You just subtract the number
4 0
2 years ago
Read 2 more answers
Select the correct answer.
romanna [79]

Employees salary [$}: 30,000, 30,000, 35,000, 35,000, 40,000, 40,000.

CEO Salary: $70,000.

The correct answer is this: BOTH JAN AND MARCY ARE CORRECT.

Jan says the employee average salary is $35,000. This is correct as shown below:

Average employee salary = 30,000 + 30,000 + 35,000 +35,000 + 40,000 + 40,000 / 6 = 210 / 6 =  $35,000.

Marcy says the average salary of all company members is $40,000. This is also true as shown below.

Average salary of all company members = 30,000 + 30,000 +35,000 + 35,000 + 40,000 + 40,000 + 70,000 / 7 = 280 / 7 = $40,000.

5 0
3 years ago
Taylor earned $48 for 6 hours of babysitting and $68 for 8.5 hours of babysitting. How long would she have to babysit to earn $3
ZanzabumX [31]
48÷6=$8 per hour
So
32÷8=4 hours
6 0
3 years ago
How do I solve this?​
lakkis [162]

Answer:

\large\boxed{4\sqrt{-81}+\sqrt{-25}=41i}

Step-by-step explanation:

i=\sqrt{-1}\\\\\sqrt{-81}=\sqrt{(81)(-1)}=\sqrt{81}\cdot\sqrt{-1}=9i\\\\\sqrt{-25}=\sqrt{(25)(-1)}=\sqrt{25}\cdot\sqrt{-1}=5i\\\\4\sqrt{-81}+\sqrt{-25}=4(9i)+5i=36i+5i=41i

3 0
3 years ago
??
Mnenie [13.5K]

Answer: 2 or 3

Step-by-step explanation:

Which ever line is going through the most points

8 0
3 years ago
Other questions:
  • How many combinations of 6 students can a teacher choose from 30 students?
    6·1 answer
  • The digital volume of a cone beam x-ray scan is 2616 cm³. To capture a craniofacial image on the detector, the base of the cone
    5·2 answers
  • What fraction strips could you make if you started with a fourths strip?
    13·1 answer
  • Write two equivalent expressions to represent the sum of the angles of this triangle.
    14·1 answer
  • This is a ceral question I have what's 9 + 10?
    8·2 answers
  • Is 8:12 equivalent to 10:15
    9·2 answers
  • Through:(-1, -2), slope = 5
    11·1 answer
  • 50 points please help
    5·2 answers
  • I need help plz 8th math
    9·2 answers
  • Brandon is a high school basketball player. In a particular game, he made some two point shots and some three point shots. Brand
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!