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
dezoksy [38]
3 years ago
9

Let z denote a random variable that has a standard normal distribution. Determine each of the probabilities below. (Round all an

swers to four decimal places.)P(z 2.37)
Mathematics
1 answer:
Lorico [155]3 years ago
4 0

Answer:

P(Z < 2.37) = 0.9911.

Step-by-step explanation:

We are given that Let z denote a random variable that has a standard normal distribution.

Let Z = a random variable

So, Z ~ Standard Normal(0, 1)

As we know that the standard normal distribution has a mean of 0 and variance equal to 1.

                          Z  =  \frac{X-\mu}{\sigma}  ~ N(0,1)

where, \mu = mean = 0

           \sigma = standard deviation = 1

Now, the probability that z has a value less than 2.37 is given by = P(Z < 2.37)

        P(Z < 2.37) = P(Z < \frac{2.37-0}{1} ) = P(Z < 2.37) = 0.9911

The above probability is calculated by looking at the value of x = 2.37 in the z table which has an area of 0.9911.

You might be interested in
n automobile manufacturer claims that its van has a 37.4 miles/gallon (MPG) rating. An independent testing firm has been contrac
JulsSmile [24]

Answer:

Then z(s) is out of the acceptance region, we reject H₀,  doubts of the independent testing firm are valids

Step-by-step explanation:

We will develop a Hypothesis Test ( a 2 tail test since the independent testing firm is interested in finding out  if there is an incorrect MPG rating from the manufacturer

Test Hypothesis :

Null hypothesis                             H₀            μ    =    μ₀

Alternative Hypothesis                Hₐ             μ    ≠    μ₀

Significance Level   α  = 0,05    α/2  =  0,025

z(c) for α/2   from z-table      z(c)  = - 1, 96   and by symmetry  z(c) = 1,96

Calculating  z(s)

z(s) =  ( μ  -  μ₀ ) / σ /√n

z(s) = ( 37,8 - 37,4 ) / 2,3 /√280

z(s) = 0,4 * 16,73 / 2,3

z(s) = 2,90

Comparison between z(c)  and  z(s)

z(s) > z(c)       2,90 > 1,96

Then z(s) is out of the acceptance region, we reject H₀,  doubts of the independent testing firm are valids

8 0
2 years ago
Find the local and global extrema for the graph of ƒ(x) = x(25 – x).
Allisa [31]

fx=25x-x²

dy/dx=0

25-2X=0

(=)X=14,5

4 0
3 years ago
Which of the following is the graph of the quadratic function y=x^2-6x-16
stepladder [879]

Answer:

this is the graph to the equation :) hope this helps in all ways possible:)

Step-by-step explanation:

5 0
3 years ago
What will your balance be on an investment of $7000 at 4% for 2 years compounded annually.
rosijanka [135]
I think the answer is 140
6 0
3 years ago
Tara, Jennifer, and Mindy donated some money to a charity. Jennifer donated twice
vodka [1.7K]

Answer:

$12

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • . mc076-1.jpg If mc076-2.jpg and mc076-3.jpg, what is mc076-4.jpg?
    15·1 answer
  • Solve for x 8x-6x= simply
    14·1 answer
  • At a local grocery store, the cost of apples varies directly with the weight of the apples. If a 5-pound bag
    11·1 answer
  • Find x.................
    5·2 answers
  • It is possible for a triangle to be which of the following?
    12·1 answer
  • (5b-9)-3(8-2b) simplify the expressio
    5·2 answers
  • 210 students were asked whether they want to go to a water park or a roller skating rink for a class party. 50 students are girl
    11·1 answer
  • 5x−2(x+1)=1/4 <br> need sum help pls
    10·1 answer
  • For the function g(x)= x-9/x+7, solve the following inequality. g(x)&gt;_0
    13·1 answer
  • Hm uh I dont get it help ?????..........
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!