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
Tems11 [23]
3 years ago
9

An article in an educational journal discussing a non-conventional high school reading program reports a 95% confidence interval

of (520 , 560) for the average score on the reading portion of the SAT. The study was based on a random sample of 20 students and it was assumed that SAT scores would be approximately normally distributed. Determine the margin of error associated with this confidence interval.
Mathematics
1 answer:
Maksim231197 [3]3 years ago
6 0

Answer:

The margin of error associated with this confidence interval is 20

Step-by-step explanation:

A confidence interval has two bounds, a lower bound and an upper bound. The interval is symmetric, which means that the margin of error is the difference between these two bounds(upper - lower), divided by 2.

In this problem, we have that:

Lower bound: 520

Upper bound: 560

Determine the margin of error associated with this confidence interval.

(560 - 520)/2 = 20

The margin of error associated with this confidence interval is 20

You might be interested in
Sammy is laying brick in his front walkway. The rectangular path measure 3/5 of a foot by 4/9 of a foot. What is the area of spa
murzikaleks [220]

Answer: 4/15ft2

Step-by-step explanation:

Area of a rectangle is

Length ×breadth

Length is 3/5

Breadth is 4/9

Area = length × breadth

Area= 3/5×4/9

Area=12/45

Divide both the numerator and denominator by 3

We have

Area= 4/15ft2

7 0
2 years ago
Bryan worked 32 hours last week. His regular hourly wage is $7.50 per hour. Calculate his gross earnings for the week.
galina1969 [7]

multiply the number of hours worked by the hourly wage.  Once you have that number multiply that by the percent deducted.  Subtract the percent deducted number from the gross pay and you have your answer.

Note: each deduction is taken out of the total gross pay.

4 0
3 years ago
2900 dollars is placed in an account with an annual interest rate of 9% Wirte an equation that calculates how many dollars will
valentinak56 [21]

Answer:

The amount that will be in the account will be $(2900 +261x)

Step-by-step explanation:

We know that the amount of money that will be in the account will be a sum of the initial principal ($2900) and the interest that is accrued after x years.

Since we already know the principal, we will have to calculate the interest that is accrued after x years.

we can use the formula:

Interest = (principal X rate X time)/ 100

Interest = (2900 \times 9 \times x)/100=261x

Therefore the amount that will be in the account will be $(2900 +261x)

6 0
2 years ago
Solve this question Find AC​
Art [367]

Answer:

26

Step-by-step explanation:

isosceles traingle:

AB=BC

7x-13=x+29

x=7

AC= 3x+5

AC= 3(7)+5

AC= 26

6 0
2 years ago
Find the 5th term <br><br> Thank you in advance
Ksju [112]
T1 = 3
t2 = 2*t1 = 6
t3 = 2*t2 = 12
t4 = 24
t5 = 48
3 0
2 years ago
Other questions:
  • Select the correct answer from each drop-down menu.
    5·1 answer
  • Line QR, line RS and line SQ are midsegments of triangle WXY. The perimeter of WXY is ____ cm.
    5·2 answers
  • I'm Stuck on this problem
    6·1 answer
  • Tori has lacrosse every 6 days and math every 7 days. She has both today. How many more days before she has both again?
    14·1 answer
  • Alexis spends 4 hours a day watching tv. how many seconds does she watch tv in a week
    14·1 answer
  • Math heeeeellllloppp
    8·1 answer
  • Need help with this!!! ASAP
    10·1 answer
  • Please help!!!!! Asap!!!!!
    6·1 answer
  • Help me please!!!! I will mark as brainliest
    8·1 answer
  • In the storage room, folders are stored in packages
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!