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]
2 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]2 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
Kevin ran 5 miles in the race. How many yards did Kevin run? (1 mile = 1,760 yards) A. 10,560 yards B. 8,800 yards C. 1,755 yard
nexus9112 [7]
1,760 x 5 = 8,800
B. 8,800
6 0
3 years ago
PLEASE HELP OUT!!! im super lost.
Alex73 [517]

Just replace X with the given value.

X = -3

f(-3) = 5 -  (-3)

f(-3) = 5 +3

f(-3) = 8

3 0
2 years ago
Write the equation that modeled the sequence 63,-21,7,-7/3,7/9
Ilya [14]

Answer:

an = 63(-1/3)^(n-1)

Step-by-step explanation:

This is a geometric sequence with first term 63 and common ratio -1/3.

The equation for the nth term  is

an = 63(-1/3)^(n-1).

6 0
2 years ago
In a sociology class there are 1414 sociology majors and 1111 non-sociology majors. 33 students are randomly selected to present
saul85 [17]

Answer: 0.4065

Step-by-step explanation:

Given : In a sociology class there are 14 sociology majors and 11 non-sociology majors.

Total students = 14+11=25

Number of  students are randomly selected = 3

Then, the number of ways to select 3 students from 25 students :-

^{25}C_3=\dfrac{25!}{(25-3)!3!}=\dfrac{25\times24\times23\times22!}{22!3!}\\\\=2300

Number of ways to select  at least 2 of the 3 students re non-sociology majors :-

^{14}C_1\times^{11}C_2+^{14}C_0\times ^{11}C_{3}\\\\=(14)\times\dfrac{11!}{2!(11-2)!}+(1)\times\dfrac{11!}{3!(11-3)!}\\\\=(14)(11\times5)+\dfrac{11\times10\times9}{6}\\\\=770+165=935

The probability that at least 2 of the 3 students selected are non-sociology majors will be :-

\dfrac{935}{2300}=0.40652173913\approx0.4065

8 0
3 years ago
. Express the following as a percent: 5 out of 30. Round to the nearest whole number
balandron [24]
5,10,15,20,25,30  that is 1,2,3,4,5,6 6 of 100 is 18
3 0
3 years ago
Read 2 more answers
Other questions:
  • <img src="https://tex.z-dn.net/?f=%20%7B6m%7D%5E%7B3%20%7D%20%20n%20%7B%7D%5E%7B3%7D%20%20%5Ctimes%208m%20%7B%7D%5E%7B2%7D%20n%5
    13·1 answer
  • Car a leaves the grand canyon at noon. it travels at 60 mph, but stops at 3 pm for an hour. car b leaves the grand canyon at 2 p
    9·1 answer
  • Stephanie is twice as old as her sister Rosa. If Stephanie is 18 years old, how old is Rosa?
    9·2 answers
  • Name the linear pair please!
    7·1 answer
  • Is the following always, sometimes or never true . 2(8x-4)-2x≤14x+12
    15·1 answer
  • The sum of three certain consecutive numbers is 240. Find the 3 numbers.
    8·1 answer
  • A balloon holds 5.2 cubic feet of air. The balloon is blown up larger to hold 8.3 cubic feet of air. What is the percent
    15·1 answer
  • How do your write a feaction with a denominator of 20 as a decimal?​
    12·1 answer
  • Mr. Jansen opened a savings account with an initial deposit of $720 and will not make any additional deposits or withdrawals. Th
    14·2 answers
  • If a number is a natural number, then it is also a whole number.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!