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7. For the 128 students who received final grades in the ruesday/Thursday sections of STA2220 in the Fa1 20 s were Freshmen, 34 were Sophomores, 50 Were ter seniors and 2 were some other classification pieons of the in a pie chart, clearly indicating the compu central angles splay these data Suppose scores on an IQ test are normally distributed with mean 10 and standard deviation 15. Find the interquartile range of the IQ test scores. Extra credit (5 pts max: show work!):

question 7 and extra credit if possible

math   Statistics-And-Probability   
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) | barn the givern-data N12 S uni ox s56 Semins = 39 Cecral angle tr eaeh classatin # of shi dents in agnlup 128 3 4 Sophomre funiens seni ers- 39 2. 8 50 128 128Date pie- cha other er 9S.1 ma n umieis Sophom sses on Ta Test are mesmolly dishi buted withmem-l06 an sta ndard deviation 1S auhles of nomal duisbuha 100- 67X15 39.95 110 0 5-89.g5 2o.

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