The following frequency distribution represents the number of hours studied per week by a sample of 60 students. Amount Spent (in $) Midpoint Frequency 2.5 less than 5.5 4 5 5.5 less than 8.5 7 30 8.5 less than 11.5 10 25 pictureClick here for the Excel Data File The mean number of hours studied is __________.

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20-05-2022
Mathematics

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The following frequency distribution represents the number of hours studied per week by a sample of 60 students. Amount Spent (in $) Midpoint Frequency 2.5 less than 5.5 4 5 5.5 less than 8.5 7 30 8.5 less than 11.5 10 25 pictureClick here for the Excel Data File The mean number of hours studied is __________.

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jainveenamrata jainveenamrata · Answer 1 · 2022-05-31T12:01:22+02:00

The table is given below. Then the standrad devaition will be 1.89.

What is a standard deviation?

It is the measure of the dispersion of statistical data. Dispersion is the extent to which the value is in a variation.

The following frequency distribution represents the number of hours studying per week by a sample of 60 students.

The table is given below.

Then the standard deviation will be

[tex]\rm SD = \sqrt{\dfrac{\Sigma M^2 \times f - \frac{(\Sigma M \times f)^2}{n}}{n - 1}}\\\\SD = \sqrt{\dfrac{4050 - \frac{(480)^2}{60}}{60-1}}\\\\SD = \sqrt{\dfrac{4050 - 3840}{59}}\\\\SD = \sqrt{\dfrac{210}{59}}[/tex]

Further solving, we have

SD = 1.89

More about the standard deviation link is given below.

https://brainly.com/question/12402189

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