HELP! i\'m not sure what I\'m doing wrong. The Weschler Intelligence Scale for C
ID: 3310271 • Letter: H
Question
HELP! i'm not sure what I'm doing wrong.
The Weschler Intelligence Scale for Children (WISC) is an intelligence test designed for children between the ages of 6 and the standard deviation is 15. Suppose that a very large and competitive school district, administrators wish to estimate the mean WISC score for all students enrolled in their programs for gifted and talented children. They obtained a random sample of 40 students currently in at least one program for gifted and talented children. The test scores 137,112, 112,147, 131,129. 122,114,117, 132, 108, 99, 105, 133, 114,105, 117, 104,91.119, 109, 134, 109, 130, 111, 102, 140, 127, 114, 118, 124, 122, 138, 121, 122, 117, 117, 134, 137, 126Explanation / Answer
Solution:- Given values : 137,112,112,147,131,129,122,114,117,132,108,99,105,13,114,105,117,104,91,119,109,134,109,130,111,102,140,127,114,118,124,122,138,121,122,117,117,14,137,126
=> x-bar = 4800/40 = 120
=> Sd = 12.6166 = 12.62
=> SE = 12.62/sqrt(40) = 1.9953 = 2
=> lower bound = 120 - (2.575 * 2) = 114.85
=> upper bound = 120 + (2.575 * 2) = 125.15
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