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the scores on an exam are normally distributed, with a mean of 85 and a standard deviation of 5. what percent of the scores are from 85 to 95?Ā 

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Karol E.
Karol E.Lv8
31 Mar 2021
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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

Related questions

(1) Suppose IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability a random sample of 1200 people has a mean IQ of less than 99?

Suppose IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability a random sample of 150 people has a mean IQ between 102 and 103?

Suppose IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability a random sample of 100 people has a mean IQ of more than 104?

Some IQ tests are standardized to a Normal model, with a mean of 100 and a standard deviation of 15.

  1. In what interval would you expect the central 95% of IQ scores to be found?
  2. About what % of people should have IQ scores above 115
  3. About what % of people should have IQ scores between 70 and 85?
  4. about what % of people should have IQ scores above 130?
  5. draw a model for these IQ scores. Clearly label it, showing what the 68-95-99.7 Rule predicts.

Some IQ tests are standardized to a Normal model, with a mean of 100 and a standard deviation of 15.

  1. In what interval would you expect the central 95% of IQ scores to be found?
  2. About what % of people should have IQ scores above 115
  3. About what % of people should have IQ scores between 70 and 85?
  4. about what % of people should have IQ scores above 130?
  5. draw a model for these IQ scores. Clearly label it, showing what the 68-95-99.7 Rule predicts.

Ā 

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