MAT 119/120 BEPARIm 4. The following frequency table shows the test score distri

Question

MAT 119/120 BEPARIm 4. The following frequency table shows the test score distribution for a of 25 students taking an introductory statistics class at a certain college,o a. Find the missing relative freo b. How many students in the sampe Relative Frequency 0.08 0.04 Score 30-40 41 -51 52 62 63 73 74-84 85 -95 had a score of at least 63 Total number of students taking an introductory statistics class at this college is 800. Based on the sample data above, estimate the total number students (in all intro to stats classes) who scored 52-84 on the test c. 0.24 0.20 0.32

Explanation / Answer

a) here as sum of total relative frequency =1

therefore missing frequency =1-0.08-0.04-0.24-0.2-0.32=0.12

b)

proportion of students have score at least 63 ==0.24+0.20+0.32=0.76

therefore number of students =np=25*0.76=19

c)

proportion of students have score between 52-84 =0.12+0.24+0.20=0.56

therefore number of students in class 52-84 =np =800*0.56=448

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