Sixteen college freshmen were asked to record the number of alcoholic drinks they typically consume in a week. here are their data: 2, 4, 6, 0, 1, 10, 9, 0, 6, 3, 6, 8, 5, 4, 6, 2. what is the variance of the number of alcoholic drinks consumed per week? a.3.26 b.2.96 c.12.25 d.8.75

Solution: The correct option is d. 8.75

Explanation:

The formula for variance is:

First we need to find the mean of the given data:

Now let's find , please have a look at the attached picture:

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: