Answer:
(-∞,-2)∪(,∞)
Step-by-step explanation:
i think it's right
Factorise the following.
2 answers:
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Answer:
There are 10 stripes in the blanket.
Step-by-step explanation:
We are given the following in the question:
Length of blanket = 2 meters
1 meter = 10 decimeter
Length of blanket in decimeter =
Change of color = Every 2 decimeters.
Number of stripe =
Thus, there are 10 stripes in the blanket.
Answer:
And we can find this probability with this difference:
And in order to find these probabilities we can using tables for the normal standard distribution, excel or a calculator.
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 variable of interest of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability with this difference:
And in order to find these probabilities we can using tables for the normal standard distribution, excel or a calculator.