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
Mandarinka [93]
3 years ago
13

the standard normal curve shown below models the population distribution of a random variable. What proportion of the values in

the population dose not lie between the two z-scores indicated on the diagram?

Mathematics
1 answer:
LiRa [457]3 years ago
5 0

Answer:

<u></u>

  • <u>0.3175  or 31.75%</u>

Explanation:

Please, find attached the diagram with the standard normal curve for this problem.

The<em> two z-scores</em> indiated are z = - 1.25 and z = 0.80

The <em>proportion of the values in the population that does note lie between the two z-scores indicated on the diagram</em> is equal to the the areas below the curve to the left of  z < -1.25 and to the right z > 0.80

The areas to the left or to the right of the z-scores are found in the tables of standard normal cummulative probabilities.

There are tables that show the cummulative probability to the left of the z-scores and tables that show the cummulative probability to the right of the z-scores.

Using a table for the cummulative probatility to the right of the z-score = 0.80 you find:

  • P(Z > 0.80) = 0.2119

Using the symmetry property of the standard normal distribution, P(Z<-1.25) = P(Z>1.25).

Thus, using the same table: P(Z>1.25) = 0.1056

Hence, P(Z<-1.25) + P(Z>0.8) = 0.1056 + 0.2119 = 0.3175.

Therefore, 0.3175 or 31.75% <em>of the values in the population does not lie between the two z-scores indicated on the diagram.</em>

You might be interested in
Dixon shadow is 9 feet long Adriana shadow is 6 feet long if Dixon is 6 feet tall how tall is Adriana
kolbaska11 [484]
Adriana would be 3 feet tall because theyre both the 3feet of difference.
8 0
3 years ago
The graph below is correct for the linear equation y=-3. <br><br> True<br> False
Oksana_A [137]

Answer:

False.

Step-by-step explanation:

The graph that is shown is correct for the equation x= -3. The graph for y= -3 would run vertically, not horizontally.

6 0
3 years ago
Read 2 more answers
use the model to solve 4 friends equally split in one half of a pound of candy how much will each friend get​
den301095 [7]
Model-? I don't see a model?-
3 0
3 years ago
Read 2 more answers
90. The number of daily evening newspapers in the United States has decreased by 46.5% to
aleksandr82 [10.1K]

Answer:

700

Step-by-step explanation:

Given:

Daily evening newspapers in 2015 = 389

Percentage decrease from 2000 to 2015 = 46.5%

To find:

Number of newspapers in 2000 = ?

Solution:

Let the number of newspapers in 2000 = x

When 46.5% of the total newspapers in 2000 (x) is subtracted from the total  newspapers in 2000 (x), it will be equal to the number of newspapers in 2015.

Making the equation as per the given statement:

x-x\times 46.5\%=389\\\Rightarrow \dfrac{100x-46.5x}{100}=389\\\Rightarrow 53.5x=38900\\\Rightarrow x\approx \bold{727}

Therefore, the answer is:

There were <em>727 </em>newspapers in 2000.

7 0
3 years ago
A electrician charges $45 per hour and spends $20 a day on gasoline.Write an algebraic expression to represent his earnings for
Sliva [168]
(45 X 24) - 20

hope this helps!
3 0
3 years ago
Read 2 more answers
Other questions:
  • You have returned from a trip to Europe and still have €200 euro. How much in U.S. dollars should you receive if the exchange ra
    14·1 answer
  • What is 2x+13-5=7x-30
    10·2 answers
  • if r and s are two solutions of the equations above r &gt; s which of the following is the value of r-s
    11·1 answer
  • Which shapes have rotational symmetry that occurs at 180°?
    10·2 answers
  • What number - 5 = 14
    8·2 answers
  • Shade a model for 1.4 divided by 0.7
    14·1 answer
  • Dana walks 3/4 mile in 1/4 hour. what is dana's walking rate in miles
    15·2 answers
  • Mary drove 380 miles using 14 gallons of gas. At this rate, how many gallons of gas would she need to drive
    13·2 answers
  • Find x if 2, 6 , x are in continued proportion
    15·1 answer
  • Find P sophomore girl hint: p(a &amp; b)/p(b)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!