il ! Assessments I communication 1 Resource content s I Lib > Sample Midterm #1

Question

il ! Assessments I communication 1 Resource content s I Lib > Sample Midterm #1 Sample Midterm #1-Quiz 1:13:22Taylor Casteen: Attempt 1 Examine the following quantitative data and calculate the indicated descriptive statistics. Data 18.1 17.8 25.0 31.9 (Hint: copy-and-paste the data into Excel and use the computer to perform the calculations.) Round your answers as indicated. a) The sample mean, rounded to two decimal places, is ab b) The zamale.standard deviatien, rounded to one decimal place, is 7.0 e) The abys d) The 2:5cots of the data value 31.9, rounded to the cearest pencent, is rounded to two decimal places, is 2 prt sc t9 144 ho 4o

Explanation / Answer

Mean is correct but std deviation = sqrt(39.21) = 6.26

Coefficient of variation = (standard deviation/mean) *100%

= (6.26/24.96) *100 = 25.09% rounded to 25%

z score for x=31.9,u=24.96,s=6.26

z = (x-u)/s = 1.11

1 2 3 4 5 Total X 18.1 17.8 25 31.9 32 124.8 24.96

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