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
Aloiza [94]
3 years ago
5

A statistics practitioner would like to estimate a population mean to within 50 units with 99% confidence given that the populat

ion standard deviation is 250. What sample size should be used
Mathematics
1 answer:
cricket20 [7]3 years ago
3 0

Answer:

Step-by-step explanation:

Using the sample size formula

n= (zs/e)²

z is the z score at 99% = 2.58

s is the standard deviation = 250

e is the sample mean = 50

Substitute

n = (2.58×250/50)²

n = (2.58×5)²

n = (12.9)²

n=166.41

hence the sample size is 166.41

You might be interested in
Students are painting a mural. So far the mural is painted 1/4 blue 2/8 red and 3/12 green. Use fraction strips to determine how
nirvana33 [79]
If you make the denominators all the same, the fractions are 3/12 , 3/12 , and 3/12. Then by simply adding them together you get that the mural is 9/12 painted. that then simplifies to  3/4 or 75%

Hope this helps :)

6 0
3 years ago
Help....................
Romashka-Z-Leto [24]

Answer:

The interquartile range is <em>50.</em>

Step-by-step explanation:

To find our answer we have to first <em>quartile 1</em> and <em>quartile 3</em> are equal too. When we look at the plot <em>quartile 1  </em>is equal to <em>20,</em> <em>quartile 3 </em>is equal to <em>70</em> because it is in between <em>60</em> and <em>80</em>.  Now to find the interquartile range we will <em>subtract 70</em> from <em>20</em> and we get <em>50</em>.  Therefore, <u><em>50</em></u><em> is our answer.</em>

7 0
3 years ago
Read 2 more answers
Is d y / d x the exact same as f ' ( x ) ? If yes, which is more commonly used?
Murrr4er [49]
It's dependent on the context. A book may ask you to find the f'(x) of a function and you may have to use a u sub in your problem which requires you to find the dy/dx of what you substitute. So in this case both would be used.
7 0
3 years ago
Given m||n, find the value of x.<br><br> (2x+9)<br> (7X+24)
motikmotik

<em>Given, 9−7x=5−3x</em>

<em>Given, 9−7x=5−3xPut x terms on one side and constants on another side.</em>

<em>Given, 9−7x=5−3xPut x terms on one side and constants on another side.⇒9−5=7x−3x</em>

<em>Given, 9−7x=5−3xPut x terms on one side and constants on another side.⇒9−5=7x−3x⇒4=4x</em>

<em>Given, 9−7x=5−3xPut x terms on one side and constants on another side.⇒9−5=7x−3x⇒4=4x⇒x= </em><em>4</em><em>/</em><em>4</em><em> </em><em> =1</em>

<em> =1Hence, required solution is x=1.</em>

<em> </em><em>p</em><em>lease </em><em>mark </em><em>me</em><em> a</em><em> </em><em>brainlist</em><em> answer</em><em> </em><em>I </em><em>need </em><em>only </em><em>1</em><em> </em><em>ok</em>

8 0
2 years ago
Plz help I need help
Kamila [148]

Answer:

Sub to XxDuckyxX it has 225

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • P²- 4p - 32 = 0 solve by filling the square
    7·1 answer
  • swimming pool is being filled with a hose.  The hose fills the pool at a constant rate.  The pool's water level rises 4 inches i
    15·2 answers
  • Solve the quadratic equation by completing the square.
    13·1 answer
  • SOLVE AND JUSTIFY RIGHT ANSWER GETS BRAIN
    14·1 answer
  • Jen picked 3/4 of a gallon of strawberries in half an hour.If she keeps picking strawberries at the same rate,how many gallons w
    11·1 answer
  • A circle with radius 3 has a sector with a central angle of 1/9 pi radians
    10·1 answer
  • A grid shows the positions of a subway stop and your house. The subway stop is located at (7, -6) and your house is located at (
    13·2 answers
  • Write a as the subject of the formula s =n (a + l).please help me ​
    6·2 answers
  • Brooke solved the equation below:
    6·1 answer
  • Darlene had 1.56 pounds of beads to make bracelets. She gave 0.978 pounds to her friends. How many pounds of beads does she have
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!