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
e-lub [12.9K]
3 years ago
5

Salaries of 40 college graduates who took a statistics course in college have a mean of $62, 200. Assuming a standard deviation

of $11,766 construct a 90% confidence interval for estimating the population mean.
round to the nearest integer as needed.
Mathematics
1 answer:
ololo11 [35]3 years ago
5 0

Answer:

Step-by-step explanation:

We want to determine a 90% confidence interval for the mean salaries of college graduates

Number of sample, n = 40

Mean, u = $62, 200

Standard deviation, s = $11,766

For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

62200 +/- 1.645 × 11766/√40

= 62200 +/- 1.645 × 1860.4

= 62200 +/- 3060.358

The lower end of the confidence interval is 62200 - 3060.358 =59139.642

The upper end of the confidence interval is 62200 + 3060.358 =65260.358

Therefore, with 90% confidence interval, the mean mean salaries of college graduates is between $59139.642 and $65260.358

You might be interested in
BRAINLIESTTT ASAP!!!!!<br> HELP PLEASE!!! I’ll appreciate it so much!
dezoksy [38]
100% + 1.8% = 101.8%
101.8% = 101.8/100 = 1.018

1) 450 * 1.018 = 458.10   in one month
2) 458,1 * 1.018 ≈ 466.35   in two months
3) 466,35 * 1.018 ≈ 474.74   in three months
4) 474,74 * 1.018 ≈ 483.29   in four months
.........................................

Answer: D.
6 0
3 years ago
Mustafa’s horse ate 6,400 pounds of hay last year. How could Mustafa determine the number of tons of hay his horse ate last year
Alona [7]

Answer:

by dividing 6,400 by 2,000

Step-by-step explanation:

We know that 2000 pounds  equals 1 ton

To convert 6400 pounds to tons, we need to

6400 pounds * 1 ton/2000 pounds

Divide 6400 by 2000

3 0
3 years ago
Geometric proofs. I just don’t understand it and my teacher isn’t helping.
pshichka [43]
The midpoint of a line can be represented by the point that is in the very center of the line. A line segment such as AT also represents half of the line. The symbol of the tilde with the equal sign underneath represents congruence meaning the two segments are the same. Therefore each equation shows the same true statement in a different form
5 0
2 years ago
This problem is taken from the delightful book "Problems for Mathematicians, Young and Old" by Paul R. Halmos. Suppose that 681
aleksley [76]

Answer:

680 games

Step-by-step explanation:

Suppose that 681 tennis players want to play an elimination tournament.

1st round:

One of 681 players, chosen at random, sits out that round and 680 players play. There will be 340 winners plus one player which sits - 341 players for the next round and 340 games

2nd round:

There will be 170 winners plus one player which sits - 171 players for the next round and 170 games

3rd round:

There will be 85 winners plus one player which sits - 86 players for the next round and 85 games

4th round:

There will be 43 winners - 43 players for the next round and 43 games

5th round:

There will be 21 winners plus one player which sits - 22 players for the next round and 21 games

6th round:

There will be 11 winners  - 11 players for the next round and 11 games

7th round:

There will be 5 winners plus one player which sits - 6 players for the next round and 5 games

8th round:

There will be 3 winners  - 3 players for the next round and 3 games

9th round:

There will be 1 winner plus one player which sits - 2 players for the next round and 1 game

10th round - final:

1 champion and 1 game.

In total,

340 + 170 + 85 + 43 + 21 + 11 + 5 + 3 + 1 + 1 = 680 games

4 0
3 years ago
The opposite of twelve percent of a number​
Salsk061 [2.6K]

Step -by-step explanation: the opposite of a number is the number on the other side of the numbers line eg -5 is the opposite of 5 so-12% is the opposite of 12%

Answer:-12%

5 0
3 years ago
Other questions:
  • For about $1 billion in new space shuttle expenditures, NASA has proposed to install new heat pumps, power heads, heat exchanger
    8·1 answer
  • Two sides of a triangle are 8 inches and 12 inches long each
    11·1 answer
  • Identify the center and radius of a circle with equation (x-5)^2+(x+3)^2=25
    7·1 answer
  • The members of the student council are selling raffle tickets. The school decides that the top three raffle ticket sellers will
    11·1 answer
  • Simplify and find each side <br> angles are 45 45 90!<br> will mark brainiest!
    15·1 answer
  • A taxi service charges $5.00 to ride in the vehicle and then $1.00 for each mile.
    15·2 answers
  • How do you solve this
    7·1 answer
  • Edwin is making brownies. He has m cups of flour. He realized that he needs 3 more flour
    6·1 answer
  • How the<br> GCF<br> of Monomials helps to factor an expression?
    5·2 answers
  • so i dont like brainly becuase they invinted this new ad thing once its runs out u cant use it for the whole day i thinks its no
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!