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
GuDViN [60]
3 years ago
13

A major television manufacturer has determined that its 44 inch screens have a mean service life that can be modeled by a normal

distribution with a mean of 6 years and a standard deviation of one-half year (6 months). What is the probability that the service life of that product is between 5 and 7 years
Mathematics
1 answer:
Neko [114]3 years ago
5 0

Answer:

P(5

And we can find this probability with thie difference:

P(-2

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-2

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

X \sim N(6,0.5)  

Where \mu=6 and \sigma=0.5

We are interested on this probability

P(5

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(5

And we can find this probability with thie difference:

P(-2

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-2

You might be interested in
I need help plzzzzzzzzz help me​
andrew11 [14]

Answer:

Which do you need help with?

1. -6 is 4 units from -2 in the negative direction.

2. A. and D

Step-by-step explanation:

When adding negative numbers the negative will be more, but if you are adding positive and negative numbers, whichever sign (+ or -) has the bigger number then that is the sign of the answer.

Additive inverses are when two numbers are added together to equal zero. Therefore if you have -3+3, it would be an additive inverse.

Hope this helps.

5 0
3 years ago
Richard walks every day for exercise at a rate of 1 kilometer every 12 min. At this rate ,how many meters can Richard walk in a
garik1379 [7]
60 minutes in an hour
60÷12=5
1,000 meter in 1 km
5×1=5
5×1000=5000
therefore, 5000 meters
3 0
3 years ago
Read 2 more answers
Find the mean of the set of data. Use a calculator if necessary.
dangina [55]

Answer:

7

Step-by-step explanation:

mean is average of the numbers

add all values then divide by the numbers

(1+5+8+10+11) / 5

35 / 5 = 7

5 0
3 years ago
Read 2 more answers
2 Joey runs 4 – miles in of an hour and Chandler runs 2 miles miles in of an hour. Who runs faster
HACTEHA [7]

Answer: Joey is faster

Step-by-step explanation: Because in 1 hour Joey is run 4 mile but in 1 hour Chandler is run 2 mile

6 0
3 years ago
Read 2 more answers
What is the answer to m^7 · m^−3?
elena55 [62]

Answer:

M^4

Step-by-step explanation:

Here use product law which state- same base power should add

M^7-3

M^4

8 0
3 years ago
Other questions:
  • What is the center of the circle represented by this equation? x2 + (y + 9)2 = 25
    10·1 answer
  • Can you please help me with the questions I will give you brainliest.
    11·1 answer
  • I really need help on this one
    13·1 answer
  • Need help on #18 & #19 please
    8·1 answer
  • Use the point-slope formula (if possible) to write an equation of the line given the following
    15·1 answer
  • Can somebody plz help answer these questions correctly (only if u done this before) thx sm!
    14·1 answer
  • tank a initially contained 124 liters of water it is then filled with more water at a constant rate of 9 liters fill in the blan
    10·1 answer
  • Help please just the answer needed
    5·1 answer
  • Yasmin conducted a scientific experiment. For a certain time, the
    6·1 answer
  • Question 3 of 56
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!