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
Jobisdone [24]
3 years ago
14

Suppose that we will randomly select a sample of 106 measurements from a population having a mean equal to 19 and a standard dev

iation equal to 7. Calculate the probability that we will obtain a sample mean less than 18.450; that is, calculate P( x < 18.450).
Mathematics
1 answer:
svet-max [94.6K]3 years ago
4 0

Answer:

z =\frac{18.45-19}{\frac{7}{\sqrt{106}}}= -0.809

And if we use the normal standard distribution or excel we got:

P(z

Step-by-step explanation:

For this case we have the following info given:

\mu = 19 represent the mean

\sigma = 7 represent the standard deviation

n = 106 represent the sample size

The distribution for the sample size if we use the central limit theorem (n>30) is given by:

\bar X \sim N(\mu , \frac{\sigma}{\sqrt{n}})

And for this case we want to find the following probability:

P(\bar X< 18.45)

And for this case we can use the z score formula given by:

z =\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And replacing we got:

z =\frac{18.45-19}{\frac{7}{\sqrt{106}}}= -0.809

And if we use the normal standard distribution or excel we got:

P(z

You might be interested in
Multiply.<br> (2x2 – 3x)(3x2 + 2x - 1)
exis [7]

Answer:

-6x^{2} –7x + 20

Step-by-step explanation:

(2x2 – 3x)(3x2 + 2x – 1)

(4 – 3x)(2x + 5)

(4*2x) + (4*5) + (–3x*2x) + (–3x*5)

8x + 20 -6x^{2} –15x

-6x^{2} –7x + 20

8 0
3 years ago
Helpppppppppppppppppppppplppoollooppp
Nat2105 [25]

Answer:

I wouldn't advise putting answers from test on brainly its against the honor of code and you will get warned.

Step-by-step explanation:

8 0
3 years ago
What is the solution to f(x)=g(x)?
blsea [12.9K]
C) and E) because for X = -1 and X= 1 the functions f(x) and g(x) they have the same values.
6 0
3 years ago
How to solve this problem
Shkiper50 [21]
You have to ask the question with the right type of something.
6 0
3 years ago
Which link between two elements could you remove from the relation so that it becomes a function? 1 and c or 3 and a 4 and d or
shtirl [24]
It would make more sense to remove 4 and D

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following points is not on the graph of y=-1/2x^2-3x+7 ?
    8·1 answer
  • Please help i need this quickly
    7·1 answer
  • 1/3+1/4 using simplest form
    7·1 answer
  • you are going to buy doughnuts for your coworkers. you buy 2 boxes of glazed doughnuts for $3.99 each, 3 boxes of chocolate-cove
    8·2 answers
  • Given f(x) = 2x² + 8x - 4 and g(x) = 5x +6, find 3f(x) – 2g(x).
    14·1 answer
  • a positive number of two digits the ten place exced.the unit place digit by 5 .if the producted digit is 46. find the number​
    15·1 answer
  • A pet store has two tanks of tropical fish. The first tank contains 2 blue fish and 7 yellow fish and the second tank contains 6
    9·1 answer
  • A closed box has a square base with side length feet and height feet. Given that the volume of the box is cubic feet, express th
    15·1 answer
  • Please help me if you can. Please also write how you got the answer thank you.
    12·1 answer
  • If B = -m +1 - 9m2 and A = m + 9, find an expression that equals 2B – 2 A<br> in standard form.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!