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Result: 2.28
5.
5.
Result = 1.87
4.
4.
Divided = 3.5
3.
3.
Sum = 14
2.
2.
Squares: 1, 0 ,4
1.
1.
mean = 3
Variation or spread will look at the differences between a wide spread of the data
12. What is the difference between Validity, Reliability, and Objectivity? Provide an example.
12. What is the difference between Validity, Reliability, and Objectivity? Provide an example.
If we are calculating how fast someone can run...validity of that measurement will be a form of measurement such as a stop watch that will keep time...reliability will be that the stop watch can track time properly...objectivity will hold that the stop watch does not have an opinion on what is fast or what is not, it is simply measuring.
11. What is Objectivity?
11. What is Objectivity?
lack of bias/personal judgement
10. What are factors affecting Reliability?
10. What are factors affecting Reliability?
Size of population...time given to mature...changes in participants
9. What is Reliability?
9. What is Reliability?
Consistent results
8. What are factors affecting Validity?
8. What are factors affecting Validity?
environment...time...subject population
7. What is Validity?
7. What is Validity?
Something will work or measure what it is suppose to
6. What is a norm-referenced measurement?
6. What is a norm-referenced measurement?
To measure whether or not someone performed better or worse than that of an average group with same background
5. What is a criterion-referenced measurement?
5. What is a criterion-referenced measurement?
To measure performance against set guidelines or criteria
4. Read and map out the answer to the questions from Khan Academy Step-by-step interactive example for calculating standard deviation
https://www.khanacademy.org/math/probability/data-distributions-a1/summarizing-spread-distributions/a/calculating-standard-deviation-step-by-step

4. Read and map out the answer to the questions from Khan Academy Step-by-step interactive example for calculating standard deviation
https://www.khanacademy.org/math/probability/data-distributions-a1/summarizing-spread-distributions/a/calculating-standard-deviation-step-by-step

3. What is the difference between measures of central tendency and measures of variation or spread?
3. What is the difference between measures of central tendency and measures of variation or spread?
Central tendency will describe what is the "average" result for this data ex mean, mode, median.
2. What is standard deviation used for?
2. What is standard deviation used for?
To compare and interpret different sets of data
1 collapsed result
1. What is standard deviation? And what are the steps to calculate it?
1. What is standard deviation? And what are the steps to calculate it?
The average amount away from the mean a group of data is
Calculate:
Calculate:
1. Find the mean 2. Calculate how far each data point is from the mean and square it 3. Add these calculations together 4. Divide by the number of data points 5. Find the square root of the result

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