Question

1.The median is a measure of central tendency (or location)? True False 2,The mean computed from...

1.The median is a measure of central tendency (or location)?
True
False
2,The mean computed from ungrouped data is a more accurate measure than the mean computed from grouped data?
True
False

3.The mode for the following values is "0"?...3.4, 4.7, 1.9, 7.6, 6.5.
True
False

4.A distribution of data that is positively skewed is left skewed?
True
False

5.In a numerical batch of data the value of "Q3" can never be smaller than the value of "Q1"?
True
False  
6.A distribution of data that is zero skewed is symetrical?
True
False
7.If the mean is less than (smaller) the median, the data are positively skewed to the right?
True
False

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

1. TRUE

Yes, the median is one of the measures of central tendency, along with mean and mode.

2. TRUE

The mean computed from ungrouped data is a more accurate measure than the mean computed from grouped data. Grouping can cause individual values to get lost in transition. Thus ungrouped data is more accurate.

3. FALSE

The mode is the most frequently occuring observation. Since all the observations above 3.4, 4.7, 1.9, 7.6, 6.5 are occuring only once, the mode is not defined. It is definitely not 0.

4. FALSE

A distribution of data that is positively skewed is right skewed and not left skewed.

5. TRUE

The value of Q3 can be never be less than the value of Q1.

6. TRUE

Yes, zero skewness implies symmetry.

7. FALSE

In a right skewed(positive) distribution, the mean is typically greater than the median.

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