Isma AT241.002 Winter 2018 work 2 Due in 2 hours, 16 minutes. Due Thu 01/25/2018

Question

Isma AT241.002 Winter 2018 work 2 Due in 2 hours, 16 minutes. Due Thu 01/25/2018 11:59 Calculate the z-score (to 3 decimal places) for quiz, the class mean was 72 with a standard deviation of 4.7. Calculate the z-score (t a person who received score of 76. -score: Most scores usually are within two standard deviations from the mean. Is the quiz score 76 unusua l? O Unusual ONot Unusual 10 (0/1) If a score is more than three standard deviations from the mean it is considered an outlier. Is quiz score 76 an outlier? 12 (0/1) 213 (0/1) 214 (0/1) 215 (0/1) 216 (0/1) O Not an Outlier OIs an Outlier 17 (0/1) Q19 [1/1) e: 3/20 t Version

Explanation / Answer

Given that mean = 72 and S.D = 4.7

Score (x) = 76

Answer: Z = (x - mean) / S.D

= (76 - 72) / 4.7

= 0.851

Therefore z = 0.851

76 falls between  two standard deviations from the means ( i.e between 62.6 and 81.4 )

So 76 is not unusal

76 falls between three standard deviations from the mean ( i.e between 57.9 and 86.1 )

76 is not more than 86.1 So, 76 is not an outlier

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