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Questions and Answers

(1101 solutions)

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At a big company the following salary information is know: μ = $80,000 and σ = $5,000. What is the salary at a z-score of -1?
  
  
  
  

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Posted by Cleveland on February 19, 2025
At a big company the following salary information is know: μ = $80,000 and σ = $5,000. What is the salary at a z-score of -1?
  
  
  
  

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Posted by Cleveland on February 19, 2025
At a big company the following salary information is known: μ = $80,000 and σ = $5,000. How much money does Miguel make if he is half a standard deviation below the mean?
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Posted by Cleveland on February 19, 2025
At a big company the following salary information is known: μ = $80,000 and σ = $5,000. How much money does Layla make if she is two standard deviations above the mean?
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Posted by Cleveland on February 19, 2025
A score is 15 points below the mean results in a z - score of -.75; what is the standard deviation?
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Posted by Cleveland on February 19, 2025
A score is 12 points above the mean results in a z - score of 1.50; what is the standard deviation?
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Posted by Cleveland on February 19, 2025

Because everyone is always driving above the speed limit, the police implement a new policy: ticket anyone who drives 1.5 standard deviations above the average.  

  • At a major freeway, the average speed in the evening is 75 MPH.  The standard deviation is 7 MPH. Michael finds himself driving at 84 MPH during an evening on this freeway.  
  • At a major street, the average speed is 43 MPH.  The standard deviation is 4 MPH. Nico finds himself driving at 50 MPH.

Use the information above to determine who will get a speeding ticket?

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Posted by Cleveland on February 19, 2025
Jessie received a 35 on a test.  If the class average was 40, what do we know about Jessie’s z-score?
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Posted by Cleveland on February 19, 2025
Suppose a normal distribution has a normal distribution with a µ = 15 and a standard deviation σ = 5. Between which values do 68% of the values lie?
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Posted by Cleveland on February 19, 2025
Suppose a normal distribution has a normal distribution with a µ = 15 and a standard deviation σ = 5. Between which values do 68% of the values lie?
Group of answer choices
 

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Posted by Cleveland on February 19, 2025