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
lesantik [10]
3 years ago
14

The average number of push-ups a united states marine does daily is 300, with a standard deviationof 50. a random sample of 36 m

arines is selected. what is the probability that the sample mean is atmost 320 push-ups?
Mathematics
1 answer:
leva [86]3 years ago
5 0
To solve we need to calculate the z-score, but since we are given the sample size then we shall begin as follows:
μ=300
σ=50
n=36
x=320
thus
σ/√n
=50/√36
=8.33333
thus the z-score will be:
z=(320-300)/8.33333
z=2.4
Thus
P(x>320)=P(z<2.4)=0.9918

You might be interested in
If s(x) = 2 - x and f(x) = 3x, which value is equivalent to (s f) (-7)
Soloha48 [4]

Answer:

Step-by-step explanation:

the first method :

s(x) = 2 - x and f(x) = 3x

(s f) (-7) = s(-7) ×f(-7)

but : s(-7) = 2 - (-7) =2+7 = 9

       f(-7) = 3(-7) = - 21

so : (s f) (-7) = (9)×(-21) = - 189

the second method :

calculate : (s f) (x) == s(x)×f(x) = (2-x) 3x = 6x - 3x²

(s f) (-7) = 6(-7) -3 (-7)² = - 42 -147 = -189

6 0
3 years ago
4/10 divided by 5/8. please answer
stiv31 [10]

Answer:

16/25

Step-by-step explanation:

got it on calculator

4 0
4 years ago
#14 two cars start from the same point, at 11:05 am, traveling in opposite directions at 45 and 24 mph, respectively. At what ti
noname [10]

The cars travel at a 21MPH difference, so if we divide 460 by 21, we get 21.9


Answer: 21.9 hours

3 0
3 years ago
Tamika went hiking with her friends. The beginning of -1 feet. The highest elevation on hiking path is 100 feet. What is the dif
const2013 [10]

hello!

so the difference is 101 and here is why!

you want to minus -1 from 100

100 - (-1)

but because it is a double negative it will become addition

100 + 1

so the difference is 101 feet

i hope this helped :)

4 0
3 years ago
Read 2 more answers
What the definition of a trapezoid
Sever21 [200]

Answer:

A quadrilateral with no sides parallel

7 0
3 years ago
Read 2 more answers
Other questions:
  • A survey asked people which kind of pet they owned. The results are shown in the table below. Of the women who
    15·1 answer
  • Help plzzzzzzzzzzzzzzz
    15·1 answer
  • I need help on finding the measure of angle a
    12·1 answer
  • Uhh I got this answer wrong my brain wasn’t working so I guessed and picked wet and salty
    15·2 answers
  • 152/600, 104/600,136/600,208/600 as decimals
    7·1 answer
  • Write the slope-intercept form of the equation of each line given the slope and y-intercept.
    11·1 answer
  • Find the surface area of the rectangular prism.
    7·2 answers
  • Fifty seven percent (57%) of the students applying to a university are accepted. In other words, there is a 57% probability of b
    13·1 answer
  • Explain symmetry property ​
    5·1 answer
  • Determine the measure of angle A, to the nearest degree.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!