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
Molodets [167]
3 years ago
9

Heather sampled the ages of 50 randomly selected people that frequented a store and obtained a mean of 24. She constructed a 95%

confidence interval which was (19.1, 28.9). What is the margin of error?
A) 2.5 years
B) 4.9 years
C) 5 years
D) 6.7 years
Mathematics
1 answer:
Jet001 [13]3 years ago
7 0
The correct answer for the question that is being presented above is this one: "D) 6.7 years." Heather sampled the ages of 50 randomly selected people that frequented a store and obtained a mean of 24. She constructed a 95% confidence interval <span>which was (19.1, 28.9). The margin of error is 6.7  years</span>
You might be interested in
What is the mean number of days in past week that the 25 respondents exercised?
Natali [406]
I believe that the mean is 6
6 0
3 years ago
if alpha and beta are zeroes of the quadratic polynomial f(x) = x2-x-2 then find a polynomial whose zeroes are 2alpha + 1 and 2b
frosja888 [35]

Answer:

Step-by-step explanation:

Hello, as alpha and beta are zeroes of

x^2-x-2

it means that their sum is alpha+beta=1 and their product alpha*beta=-2.

The polynomial whose zeroes are 2 alpha + 1 and 2 beta + 1, means that the sum of its zeroes is 2(alpha+beta)+2=2+2=4

and the product is (2alpha+1)(2beta+1)=4 alpha*beta + 2(alpha+beta) + 1 = 4 * (-2) + 2*(1) +1 = -8 + 2 + 1 = -5. so one of these polynomials is

\Large \boxed{\sf \bf \  \ x^2-4x-5 \ \ }

Thank you.

5 0
3 years ago
the number of pages in the US tax code exceeds the number of pages in The Bible by 18528 the combined number of pages in the tax
Pani-rosa [81]
Tax code- Bible = 18528
tax code + Bible = 21472

add the two together to get
2* tax code = 18528 + 21472
tax code = 20000
7 0
3 years ago
A system of equations is shown below. Which statement about the ordered pair (-7,-3) is true?
antoniya [11.8K]
Answer:

C) It is the only solution to the system.

Step-by-step explanation:

3x + 3y = -30

2x + y = -17

3(-7) + 3(-3) = -30

-21 + -9 = -30

-30 = -30

True

2x + y = -17

2(-7) + (-3) = -17

-14 + -3 = -17

-17 = -17

True

7 0
3 years ago
Read 2 more answers
Which is the correct cofunction identity for tan theta?
Alinara [238K]

The cofunction identities for tangent are:

tan (90° – θ) = cot θ and cot (90° – θ) = tan θ

3 0
4 years ago
Other questions:
  • 2x + y = 3 x - 2y = -1 If equation two is multiplied by -2 and then the equations are added, the result is what?
    11·1 answer
  • The points (8,-10) and (6,w) fall on a line with the slope of -2. What is the value of w?
    5·1 answer
  • How do u calculate these numbers from least to greatest 0.02, 0, 6.98, 2 1/16, 2.2, 6.89, 2.01
    5·1 answer
  • 2km = ? m<br> 250cm = ? m
    11·1 answer
  • How to write 7.5 as a fRACTION
    14·1 answer
  • Answer the following true or false. Justify your answer.
    6·1 answer
  • If n is a positive integer, then lim n→∞ 1/n[(1/n)^2+(2/n)^2+...+((n-1)/n)^2] can be expressed as...
    9·1 answer
  • The value of the x-intercept for the graph of 4x-5y=40 is<br> 1) 10<br> 2) 4/5<br> 3) -4/5<br> 4) -8
    12·2 answers
  • What is the constant of proportionality in this proportional relationship?
    6·1 answer
  • Victor tossed a paper cup and recorded how the cup landed each time. He organized the results as shown below. Find the experimen
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!