Mark got 18 out of 25 questions correct on his test what percent of the question did he do correct
2 answers:
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Answer:
And we can find this probability using excel or the normal standard tabe and we got:
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 temperatures 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 using excel or the normal standard tabe and we got:
Answer:
The equation in the slope-intercept form will be:
Step-by-step explanation:
Given the points
- (-39,49)
- (0,0)
Finding the slope between the points using the formula
We know that the point-slope of the line equation is
substituting and (-39,49) in the equation
Now writing the equation in slope-intercept form
where m is the slope and b is the y-intercept
∵
Where
and the y-intercept i.e.
Therefore, the equation in the slope-intercept form will be: