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Questions and Answers

(1243 solutions)

All Single Questions Exams
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Question

A sample with n = 12 has a mean of M = 5 and another sample with n = 4 has a mean of M = 6.  If the two samples are combined what is the new mean?

 

  
  
  
  

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Posted by Cleveland on February 19, 2025
Question
A population has a mean of µ = 12 and ∑x = 240. How many scores are in the population?
  
  
  
  

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Posted by Cleveland on February 19, 2025
Question
A State college wanted to know the hourly wage for every employee - this would include administrators (College President), faculty, staff and student workers who were earning approximately minimum wage. Which  is the best measure of central tendency for these data?
  
  
  

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Posted by Cleveland on February 19, 2025
Question
A State college records the city/town for each student who attends Fall semester.  Which  is the measure of central tendency for these data?  
  
  

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Posted by Cleveland on February 19, 2025
Question
A class of 20 students has an average age of 24.  Two students leave the class, and both of the students are 20 years old.  What is the new class average age?
  
  
  
  

Ans is 24.4...

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Posted by Cleveland on February 19, 2025
Question
A sample has n = 7 scores and a mean of M = 8.  One new score was added to the sample and the new mean is M = 10. What is the value of the sum of scores (𝝨x)?
  
  
  
  

ans is 80...

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Posted by Cleveland on February 19, 2025
Question
After 4 points have been added to every score in a distribution the mean is calculated and found to be M = 34. What was the value before?
  
  
  
  

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Posted by Cleveland on February 19, 2025
Question
A sample of n = 10 and has mean of M = 5. If each score is multiplied by 3, then the new mean is:
  
  
  
  

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Posted by Cleveland on February 19, 2025
Question
A population has a mean of µ = 5 and ∑x = 225. How many scores are in the population?
  
  
45
 
  
  

Ans is 45...

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Posted by Cleveland on February 19, 2025
Question

What is the mean for the following set of population scores:

xf
71
61
52
43
36
26
11
  
  
  

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Posted by Cleveland on February 19, 2025