AT&T 2:44 PM Done ALEKS_Elyse London3.pdf A ALEKS: Byse London Question 4 of 5 A

Question

AT&T 2:44 PM Done ALEKS_Elyse London3.pdf A ALEKS: Byse London Question 4 of 5 A sample of 10 drivers shows the time that they spent (in minutes) stopped in resh-bour traffic on a specific snowy day last winter. Round your answers to one decimal place. 65 45 62 60 53 5 53 55 54 4 Download data Part I Find the range The range is Part 2 Find the variance. The variance is [- . Part 3 Find the standard deviation The standard deviation is 42018 ALEKS Eyse London Question 5 of 5 Starting teacher salaries for upper secondary education in selected countries are listed belom.

Explanation / Answer

1) The range = 75 - 45 = 30

2) Mean = (65 + 45 + 62 + 60 + 53 + 75 + 53 + 55 + 54 + 74)/10 = 59.6

3) Variance = ((65 - 59.6)^2 + (45 - 59.6)^2 + (62 - 59.6)^2 + (60 - 59.6)^2 + (53 - 59.6)^2 + (75 - 59.6)^2 + (53 - 59.6)^2 + (55 - 59.6)^2 + (54 - 59.6)^2 + (74 - 59.6)^2)/9 = 92.5

3) Standard deviation = sqrt(92.5) = 9.6

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