Answer :
The student-to-faculty ratios of the 84 fifth-grade classes sampled have a mean of 16 05 and a standard deviation of 1.24 Complete parts are as:
[tex]\bar x + 3s= 16.05 + (3\times1.24)=19.77\\\bar x +2s = 16.05 +(2\times1.24)= 18.53\\\bar x +s=16.05+1.25=17.29\\\bar x -3s= 16.05-(2\times1.24)=12.33\\\bar x-2s=16.05-(2\times1.23)=13.57\\\bar x-s=16.05-1.24=1481\\\bar x= 16.05[/tex]
One of the variables collected was the class size in terms of student-to-faculty ratio. The student-to-faculty ratios of the 84 fifth-grade classes sampled have a mean of 16 05 and a standard deviation of 1.24
Given:
Mean ([tex]\bar x[/tex] ) = 16.05
Standard deviation ( [tex]s[/tex] ) = 1.24
[tex]\bar x + 3s= 16.05 + (3\times1.24)=19.77\\\bar x +2s = 16.05 +(2\times1.24)= 18.53\\\bar x +s=16.05+1.25=17.29\\\bar x -3s= 16.05-(2\times1.24)=12.33\\\bar x-2s=16.05-(2\times1.23)=13.57\\\bar x-s=16.05-1.24=1481\\\bar x= 16.05[/tex]
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Incomplete Question:
One of the variables collected was the class size in terms of student-to-faculty ratio. The student-to-faculty ratios of the 84 fifth-grade classes sampled have a mean of 16 05 and a standard deviation of 1.24 Complete parts (a) through (d) bellow.
[tex]\bar x+3s=\\\bar x +2s=\\\bar x+s=\\\bar x-3s=\\\bar x-2s=\\\bar x-s=\\[/tex]