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
olya-2409 [2.1K]
2 years ago
12

You want to estimate the mean number of sentences in a magazine advertisement.How many magazines advertisements must be included

in the sample if you want to be 95% confident that the sample mean is within one sentence of the population mean
Mathematics
1 answer:
saul85 [17]2 years ago
3 0

Complete question:

You want to estimate the mean number of sentences in a magazineadvertisement. How many magazine advertisements must beincluded in the sample if you want to be 95% confident that thesample mean is within 1 sentence of the population mean ? (sigma =5)

Answer:

96

Step-by-step explanation:

We have level of confidence = 95%

Alpha = 1-0.95

= 0.05

Alpha/2 = 0.025

Z-alpha/2 = 1.96

E = margin of error = 1

For this question the formula to derthe sample size is given as:

n = [(Za/2 x sigma)/E]²

n = (1.96 x 5/1)²

n = 9.8²

= 96.04

So 96 magazines advertisement must be included in the sample to be 95% confident.

You might be interested in
How can I write Five less than the quotient of a number and 3 is -7 in algabreaic expression
vladimir1956 [14]

Answer:

(n\div{3})-5={-7}

7 0
2 years ago
The following cone has a height of 12 cm and a slant height of 13 cm. A right angle is formed between the height and radius of t
Pachacha [2.7K]

Length of the radius of the cone is equals to 5 cm.

<h3>What is right circular cone?</h3>

" A right circular cone is the 3 dimensional solid shape, which has an axis that is perpendicular to its circular base."

Formula used

Pythagoras theorem

(Hypotenuse)² = (adjacent side)² + (opposite side)²

According to the question,

Slant height 'l' of the cone = 13cm

height 'h'  of the cone = 12cm

Let 'r' be the radius of the base of the cone.

As per the diagram,

InΔABC,

Apply Pythagoras theorem, we get

(l)² = (h)² +(r)²

Substitute the values of 'l' and 'h' in the formula we get,

  (13)² =(12)² + (r)²

⇒ (r)² = 169 - 144

⇒ r =√25

⇒ r = 5cm

Hence, length of the radius of the cone is equals to 5 cm.

Learn more about right circular cone here

brainly.com/question/12478210

#SPJ2

4 0
1 year ago
Read 2 more answers
Hii gys drop some thanks✌✌​
Anastaziya [24]

Answer:

Thanks????????????????????

3 0
2 years ago
Maaz has a bank account with less than $400 in it. His bank pays no interest on that account, and charges $2 per month for each
Ede4ka [16]

Answer:

Around $352

Step-by-step explanation:

400 -48

5 0
3 years ago
PLEASE ANSWER ASAP WITH WORK FOR BRAINLEST!!!!!!!!!!!!!!!!
-BARSIC- [3]
First divide both sides by 12 so u get 5x -4.5 = 3. Now add 4.5 to both sides and u get 5x = 7.5. Now divide 7.5 by 5 and u get 1.5
6 0
3 years ago
Other questions:
  • Help and explanation with this probability question would be really appreciated :)
    15·1 answer
  • When one patient with a common cold takes a medicine and the other patient does not take any medicine the person who takes medic
    5·2 answers
  • A wire is bent to form a square with a perimeter of 16.4 cm. how much wire would be needed to form 25 such squares express your
    13·1 answer
  • What point divides the directed line segment AB into a 2:3 ratio?
    9·2 answers
  • For what values of x is the expression below defined?<br> Look at the picture(15 points)
    7·1 answer
  • Which expression is equivalent to 4(6x + 2) - 5(2x - 1)?
    15·1 answer
  • What is the decimal expansion for 12 8/9 ​?
    11·1 answer
  • The first equation in a system is 5x + 2y = –4. Which equation gives a system with no solution? A. y = 2x + 6 B. y = 1/4x – 2 C.
    14·1 answer
  • Simplify the following expression.<br> 11 to the 6th power<br> 114 to the 4th power
    15·1 answer
  • URGENT Write the equations of a line parallel to y = -1/3x-4 thru (6,-4)
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!