as the class size in terms of student-t aculty ratio. The student to faculty rat

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

(b)

According to emprircal rule, 68% data vaues lies within one standard deviation of mean. That is at least 75 *0.68 = 51 data values out fo 75 fifth garders classes sampled have student to faculty ratios between 13.69 and 15.93.

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