The complex number represented by the point graphed on the complex plane below is -3-3i
Complex number is generally expressed as z = x + iy
where:
From the complex plane shown, we can see that the point lies in the Quadrant III of the xy plane.
The coordinate of the point on the plane is given as (-3, -3). This can be represented in complex notation as -3 - 3i
Learn more on complex number here: brainly.com/question/5564133
Answer:
Explanation:
<u>1. Find how many standard deviations is 3.4 from the mean, 2.62</u>
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<u>2. Apply the empirical rule</u>
The empirical rule, or 68 - 95 - 99.7 rule, states that, for a normal distribution (a bell-shaped distribution), 68% of the data are within one standar deviation of the mean, 95% of the data are within two standard deviations from the mean, and 99.7% of the data are within three standard deviations from the mean.
We calculated that 3.4 is 2 standard deviations from the mean.
Since 95% of the data are within 2 standard deviations from the mean, 5% of the data are out of the 2 standard deviations region; half of that (2.5%) are abovethe mean + 2 standard deviations
Hence, the grade point averages of 95% + 2.5% of the students are below the mean plus two standard deviations, and you can say that that is the percentage of students whose grade point averages are at least 3.4.