Answer:
A
Step-by-step explanation:
The correct option is (A).
Answer:
Where
the mean and
the deviation
Since the distribution for X is normal then we can conclude that the distribution for the sample mean
is given by:


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
the mean and
the deviation
Since the distribution for X is normal then we can conclude that the distribution for the sample mean
is given by:


9514 1404 393
Answer:
correct as marked (145°)
Step-by-step explanation:
Angles ABC and DBE are "vertical" angles. As such, they are congruent.
∠ABC = ∠DBE = 145°
Answer:
1527
Step-by-step explanation:
just do 19,087.50 divided by 12.50
Answer:
6.85565
Step-by-step explanation: