With inverse functions you just swap 'x' and 'y' and solve for 'y'.
Swap 'x' and 'y':
Add 7 to both sides:
Take the square root of both sides:
Swap 'x' and 'y':
Add 7 to both sides:
Take the square root of both sides:
Ms. Huggins collected data from each of her four math classes to see if having an after-school job was independent or dependent
1 answer:
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Answer:
Let X the random variable that represent the pulse rates of a population, and for this case we know the distribution for X is given by:
Where and
For this case the z score given by:
And for this case the z score is without units, so the correct answer would be:
The z scores are numbers without units of measurement.
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 pulse rates of a population, and for this case we know the distribution for X is given by:
Where and
For this case the z score given by:
And for this case the z score is without units, so the correct answer would be:
The z scores are numbers without units of measurement.