(20pts ror turned n on tine 7.(8pts)The figure below shows a split stemplot of t
ID: 3353487 • Letter: #
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(20pts ror turned n on tine 7.(8pts)The figure below shows a split stemplot of the lQ test scores of 78 seventh grade students in a rural Midwestern school. 2.4 7 7,9 86,9 90,1,3,3 96,7,7,8 10,0,2,2,3,3,3,3,4,4 105,5,5,6,6,6,7,7.7,7,8,9 110,0,0,0,1,1,1,1,2,2,2,2,3,3,3,4,4,4,4 11 5,5,6,8,8,9,9,9 12 0,0,3,3,4,4 12 6,7,7,8,8,8 13 0,2 (2pts) In the split stemplot, there are two stems with the same value. The upper stem contains leaves 0, 1, 2, 3, and 4, and the lower stem contains leaves 5,6,7,8 and 9. Each leaf value represent one individual in the study. How many individuals have their IQ score 107? a. b. (2pts) Four students had low scores that might be considered outliers. Ignoring these, describe the shape(symmetric, negatively skewed, positively skewed), and spread (range of data values) of the distribution. c. (2pts) What percent of those 78 students have scores below 100? d. (2pts)How many students have scores between 120 and 129?Explanation / Answer
(a) answer is 4,
there are 4 studens having IQ 107
(b) shape of the distribution is symmetric and
spread of the distribution i,e. range=maximum - minimum=136-86=50
minimum IQ=86 and Maximum IQ=136
(c)14 observation are below 100 , so its percentage =100*14/78=17.95%
(d)12 observations are between 120 and 129
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