One Variable Statistics - Measures of Central Tendency and Measures of Spread

Questions and Answers

- 1.
### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find the mean (correct to 2 decimal places)

Explanation

Add them all up and divide by the number of items.Rate this question:

- 2.
### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find the median

Explanation

Find the middle value. (in this case halfway between the two middle values)Rate this question:

- 3.
### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find the mode

Explanation

The most common valueRate this question:

- 4.
### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Q1

Explanation

Q1 is the median of the lower half of the dataRate this question:

- 5.
### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Q2

Explanation

Q2 is the median of the whole listRate this question:

- 6.
### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Q3

Explanation

Q3 is the median of the upper half of the dataRate this question:

- 7.
### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find IQR

Explanation

IQR = Q3 - Q1Rate this question:

- 8.
### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Range

Explanation

Range = Max - MinRate this question:

- 9.
### Use the following set of data for all the questions:{4,5,5,5,5,6,7,7,7,8,9,11}Find Standard Deviation (correct to 2 decimal places)

Explanation

First find the sum of all the x squared values (565), subtract the count (12) times the mean (6.5833333) squared, then divide by the count (12), and finally take the square root.Rate this question:

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