Question

Scores of the abol shaped a) What percent of people has a b) What percentage of people has an (c) What percentage of people has an t score score score gr h e 100 2 1237 than 12 a s 126 (a) (b) c) (Type an integer or a decimal (Type an integer or a decimal Type an integer or a decimal

Answer 1

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According to Cminical aule in one sp of mean total dala lie=687 s with in Two-SD of mean total data lie= 95% with in three so of mean total dato lie = 99.7%. Now given u=1005-14 within one ap of n with in Two- with in tree 4.35 4-25 uno M = 100 uto M420 lootu tu M430 100-14 =86 Now Percent of data people has an Il score betweer 72 and 128 (trick in QCSD) P(72<x< 128) = P/ 72-100 X-4 128-100 | = P(-2 < x-u<2) =P (IZ KE) = 0.95 =) 95% b) percentage of people has an Ia soome close than 79 och greater than 128 5600-95 = 87 c) PCX>128) = 1- P(xal a 128-100) 14 = 1- Plaaa) i 1-0.97724 -0.02276 90.023 - 2.3%

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