KIN 3502 Chapter : Stats 1

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Copyright b. baker do not post online or distribute. Provide information about group and individual performance relative to the group. (sigma) = sum of; add up all the numbers. Sum of the scores divided by the number of scores. Disadvantage: affected by extreme scores (especially with small samples) Median [posi3on = (n +1)/2]=13th score. Amount all scores differ or deviate from the mean. Regardless of the distribution of the population, the means of repeated samples from that population will have a normal distribution. Scores vary from day to day and from sample to sample. Example: standard error of standing long jump scores, class standard dev. = 16. 28. n= 91: standard error of the mean. Grand mean = 69. 72; standard error = 1 . 70. 68 % confidence inter val 68. 02 to 71 . 42. 95% confidence inter val 66. 32 to 73. 12. 99% confidence inter val 64. 62 to 74. 28. Mean, median and mode are at the same point (center)

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