Question

xremember to round to nearest whole number) a) 10 7) b) 13 c) 15 d) 8 Median a) 85 8) b) 4.5 c) 1 d) 3 b) 46% 9) What % of the data is greater than 7? a) 35 % c) 50% d) 25% Given the following raw data 414,21,22,30,25,27,27,18,12) construct a grouped frequency distribution with the first class being 12-15 and equal class widths lower limit-upper limit class f 3 5 b) 5 c) 4 d) 1 10) What is the class width? a) 3 b) 22 11) What is the lower limit of the 3rd class? a) 20 c) 14 d) 18 A data set is normally distributed with mean- 400 and standard deviation 25, find the % of data that is a) 35.12 % b) 54.76% c) 84.13% d) 13.99 % 12) below 425? 13) Above 350? a) 97.72 % 14) Between 350 and 425? a) 13.5 % b) 5476% c) 84.13 % d) 35.12 % b) 81 85% c) 2.28 % d) 26.43 % 15) What is the median? a) 25 b) 400 c) 425 d) 350 c) 350 16) What data value is 2 standard deviations below the mean? a) 475 b) 400 d) 450 For problems 17-20 answer a (true) or b (false) 17) the mean is a resistant measure of center 18) the number of cats youL Own is quantitative data 19) If your data value is below the mean, your z score is positive 20) In a normally distributed data set, the mean, median and mode are all equal

Answer 1

Clas s Louer linit uffer Lit 12 16 18 1 18- 21 1 21- 24 1 24n 30 16 elass eidth 3 11 lower limit 3 olass18 let X N(40, 25) 1 2 . P (x< 495) P(X- 40 0 25 11 &4134 84134 X100 84.13 % 1 P(X980) 100 2 400 (-2) X10 A-G9]Kto 2.275 100-2.27) % 97.구오어어 (a) ABove 980 -N le

P 950 x425| -[xchpst 84134-022 .818 1 feseemtage .8185 Xo0 8t.86 %. Mediam be 0 X]J PIXVAD O.S X-400 25 r400 R-400 25 Nediam 400 2 stamdagd deviatin telots mesu 400-0 2 X 26 3S0 11 false 20) 19uue