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
elixir [45]
2 years ago
7

A random sample of 169 observations is to be drawn from a population with a mean of 80 and a standard deviation of 39. find the

probability that the mean of the sample will exceed 85.

Mathematics
1 answer:
Drupady [299]2 years ago
8 0
Mu=80, sigma=39, X=85
Z=(X-mu)/sigma = 5/39=0.128=0.13
P(X<=85)= 0.5517 (from Z-table)
so, P(X>85)=1-0.5517=0.4483 approx. thats 44.8% probability.

You might be interested in
2. Jon is firing his slingshot towards a tree, when suddenly gravity on the earth disappears.
Yuliya22 [10]

Answer:

im not sure you wrote the awsner right

4 0
3 years ago
25% of the items were on sale. There were 120 items How many were on sale?
Liono4ka [1.6K]
There were 30 items on sale. Hope this helps and please give Brainliest!
8 0
3 years ago
Read 2 more answers
Estimate 80,767 - 37,291 by first rounding each number to the nearest thousand.
Evgen [1.6K]

81000-37000=44000

Rounded to the nearest thousand

3 0
2 years ago
Read 2 more answers
A square has an area that is less than 100m^2. What is a reasonable range for the graph of the square side?
bezimeni [28]
The area of the square is obtained by taking the square of the length of one side. Since it is said that the area of the square is less than 100 m^2, taking the square root of that where: sqrt (100) = 10, the side of that square should be less than 10 as well. Among the choices, D. 0 <y <10 (where y = length of side of square) is the correct answer.
3 0
3 years ago
28 percent of 63 is what
baherus [9]
The answer is 17.64    

4 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE EXPLAIN: h(x) = sqrt(4-x^2), find the domain and range.
    5·1 answer
  • If ab parallel to CD then the value of x is find the attached image ​
    14·1 answer
  • At a local high school, enrollment in the drama club increases by 5 percent each year. What is the common ratio in this situatio
    7·2 answers
  • BRAINLIEST &amp; 50 POINTS
    5·1 answer
  • These questions are from financial liteeracy
    13·1 answer
  • Kris is 1.5 meters tall and casts a shadow 4 meters long. At the same time, a statue casts a shadow 12 meters long. What is the
    7·2 answers
  • Zachary and Omari starts working at 8 am Omari takes a break every 3 hours when will they take a break??
    14·1 answer
  • (2b+12) divided by 2
    8·2 answers
  • In the figure, AOB and COD are straight lines. Find x and y.<br> E<br> A<br> 20<br> 65<br> B
    14·1 answer
  • What is the LCM of 8 and 10 is ______. Numerical Answers Expected! Answer for Blank 1​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!