as the class size in terms of student-t aculty ratio. The student to faculty rat
ID: 3042817 • Letter: A
Question
as the class size in terms of student-t aculty ratio. The student to faculty ratios of the 75 th gra A sample of fifth grade classes as studied in an article. One of ee variables collected mean of 14.81 and a standard deviation of 1.12. Complete parts (a) through (d) below a. Construct the graph shown below X-3s 11.4515.93 x-2s12.57 x+2s 17.05 i-s“ 13.69 3s - 18.17 -14.81 Type integers or decimals. Do not round) b. Apply Property 1 of the empirical rule to make pertinent statements about the observations in the sample At least out of fifth-grade classes sampled have student-to-faculty ratios between and Type integers or decimals. Do not round.)Explanation / Answer
SolutionA:
your marked answers correct
> 14.81 -1.12
[1] 13.69
> 14.81 +1.12
[1] 15.93
> 14.81 -2*1.12
[1] 12.57
> 14.81 +2*1.12
[1] 17.05
> 14.81 -3*1.12
[1] 11.45
> 14.81 +3*1.12
[1] 18.17
Solutionb:
according to empirical rule
68% of the data lies in between within one standard deviation of mean
ANSWER:
ATLEAST 68 OUT OF 100 FIFTH-GRADE CLASSES SAMPLED HAVE STUDENT -TO-FACULTY RATIOS BETWEEN 13.69 AND 15.93
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