Statistics > EXAMs > Sophia college Algebra Unit 2 Milestone 2 (All)
Sophia college Algebra Unit 2 Milestone 2
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What is the probability that the average income level in the neighborhoods was less than $36,500? 83% 4% 96% 17% RATIONALE First we need to find the z-score. The mean is $40,000, the value we ar ... e looking for is $36,500, and the standard deviation is $2,000, so the z-score is: Next, we need to find this probability in our z-table. A z-score of -1.75 corresponds with a probability of 0.0401. This is the probability that the value is LESS THAN $36,500, which is about 4%. CONCEPT Application of z-Scores 4/2/2021 Sophia :: Welcome https://www.sophia.org/spcc/foundations-of-statistics-2/milestone_take_feedbacks/8515624 2/16 2 Clarice was in the process of creating a report on the performance of her students and was trying to determine the z-score related to overall student scores. If the mean percentage of students was 75% and the standard deviation was 10%, what z-score would correspond to a student that ended the course with a 75%? 0 3 -2 -3 2 1 RATIONALE Remember the formula for z-score is: For this problem these values are as follows: Plugging these values into the formula for a z-score gives the following [Show More]
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