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
erica [24]
3 years ago
11

The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population st

andard deviation of 25. What is the probability we could select a sample of 80 adults and find the mean of this sample is between 95 and 105
Mathematics
1 answer:
saveliy_v [14]3 years ago
5 0

Answer:

The probability is 0.6796

Step-by-step explanation:

Given

Population Mean - 100

Population Standard Deviation - 25

As we know

z = x-μ/σ, where:

z is the standard score

x is the raw score  

μ is the population mean

σ is the population standard deviation

Z value for mean of sample = 95

z1 = -100+95/25 = -5/25 = -0.2

P value for Z = -0.2 is 0.2912

Z2 = 100-105/25 = 0.2

P(z > 0.2 = 1 - P(z ≤ 0.2) = 1 - 0.0294 = 0.9706

P(-0.2 < z < 0.2) = 0.9706 - 0.2912= 0.6796

The probability is 0.6796

You might be interested in
help please i dont know how to do this the screenshot should have everything i dont know alot this is my first time doing a ques
MatroZZZ [7]

Answer:

it's D

Step-by-step explanation:

it's d because if 74 would be the same as the left side next to x and if you turn that into a problem like 180-74 and I got 180 cause half of a circle is 180 and then my answer would be 106 I'm not good at explaining but it's d

5 0
2 years ago
Read 2 more answers
2 divided by square root 13 plus square root 11
coldgirl [10]

Answer: 3.87132498658 in other words 3.871

Step-by-step explanation:

4 0
1 year ago
Find the area of the figure​
Alex17521 [72]

Answer:

To find area of parallelogram, multiply base and height

Step-by-step explanation:

Base is 6, height is 4

6 x 4 =  x

x = 24

4 0
3 years ago
Can a pair of numbers have more than one common factor?
Y_Kistochka [10]
Yes! For example, 10 and 20 have 1, 2, 5, & 10 in common ^.^
4 0
3 years ago
1. find the sum of the measures of exterior angles, one at each vertex, of an octagon.
love history [14]
For #1, C. 1080, For #2, B. 7, For #10, I think its because of the reflexive property (honestly, Google it just to be safe) , And for #11, A Rhombus, Having trouble remembering why but I know its not a rectangle or square.

5 0
2 years ago
Read 2 more answers
Other questions:
  • Expand the square (x + 4)2
    7·1 answer
  • Place the decimal point in the answer to make it correct. Explain your reasoning. 3.9853 x 8.032856 = 32013341
    10·1 answer
  • A system of two linear equations is graphed on a coordinate plane. If the system of equations has infinitely many
    10·1 answer
  • What number is 120% of 80
    11·1 answer
  • How many times larger is 2x10^3 is 8x10^6
    6·1 answer
  • One yard of a ribbon costs 3 1/2 dollars. How much should one pay for 5/8 yards?
    9·1 answer
  • There are 250 freshman at Central High School. You survey 50 randomly selected freshman and find that 38 plan to go to the schoo
    15·1 answer
  • Mai and Priya were on scooters. Mai traveled 15 meters in 6 seconds. Priya travels 22 meters in 10 seconds. Who was moving faste
    10·1 answer
  • Please help this is due today!
    15·1 answer
  • Solve the following <br><br> 4x-1/2=x+7
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!