Question

2.) A survey ELAC Student and the time they spend studying per week is given in the table below If a student studies 14 hours per week, would that student be considered unusual? Hours per Week Frequency 0-3 100 4-7 87 8-11 50 12-15 35 16-19 20 20-23 18

Answer 1

Page wether a To check Value of a ddata is Cnusual fivst URuad r wen Calcul ate ofhe Mean and ptandendldeviation af gIean desta follows as HTWK Mid vals fr -3 1.5 225 2,25 150 4-7 87 2631 15 5,5 418.5 2025 8-11 50 9.5 4750 90 25 4512.5O 91-71 35 472.S 13.5 182.25 16378 75 16-19 20 17.5 6125 350 306.25 20-23 18 N=310 387 Efx=2313 2313 -7.46 462125 83 20.56 21.5 Ef=28,193,5 Mean-f 310 =7.46 The Standud devation Etzt 28193 S 746 310 90.95-7,46 9.11 (Neealy davation 91 83.49 The Standd

-Mirmale Date Page ilut X=L4 hrs Pu weilc Moun Xor M7,46 X -JM 14-7.46 Maly 72 Z=O.72 trom tha tubla a 2 The we observe Phet Scoras for ZSCore 72 15 C7692 017642 0.7642 Ptahderd deviatons 4 1S away from sthe Mean the Intervat og 2 stande rot derattoas rom tu Mea ca uih Conctude hat hrs Con sidened uSual Can So we Per week than 2 Note any r fatte Standerd deviatron fromthe mean the tOttt Considared un u h cut tC