Can I have some help please And please make sure it's right
1 answer:
Answer: OPTION C.
Step-by-step explanation:
According to the Quotient of powers Property, if you divide two numbers whose base is the same, you must rewrite the base and subtract the exponents. Observe:
Notice that "a" is the base and "m" and "n" are the exponents.
Therefore, knowing this property, you can solve the exercise.
Given the following expression:
You can notice that the base 3 is in the numerator and in the denominator, then you must apply the Quotient of powers Property and subtract the exponents.
You get that the result is:
You might be interested in
Answer:
(B) The standard normal variable Z counts the number of standard deviations that the value of the normal random variable X is away from its mean
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Positive z-score: Above the mean
Negative z-score: Below the mean
All variables are continuous.
X can be positive or negative, just like Z
So the correct answer is:
(B) The standard normal variable Z counts the number of standard deviations that the value of the normal random variable X is away from its mean