Question

multiple choice questions: choose the correct answer from the choices for each question. 6. what does a standard deviation of zero mean for a data set? a) all values are different b) all values are the same c) the mean is zero d) the data is skewed 7. which step is not part of calculating standard deviation? a) find the mean b) subtract the mean from each data point c) multiply all data points together d) take the square root of the average squared difference 8. if a set of test scores has a high standard deviation, what does this mean? a) the scores are close together b) the scores are spread out c) all students got the same score d) the mean is higher than the median 9. what is the first step in calculating standard deviation? a) add all the squared differences b) find the mean of the data set c) take the square root d) divide by the number of data points

Explanation:

• Question 6: Standard deviation measures the amount of variation or dispersion in a set of values. A standard - deviation of zero means there is no variation, so all values are the same.
• Question 7: The steps to calculate standard deviation are to find the mean, subtract the mean from each data point, square the differences, find the average of the squared differences, and then take the square root. Multiplying all data points together is not part of it.
• Question 8: A high standard deviation indicates that the data points are spread out from the mean.
• Question 9: The first step in calculating standard deviation is to find the mean of the data set.

Answer:

1. B) All values are the same
2. C) Multiply all data points together
3. B) The scores are spread out
4. B) Find the mean of the data set