Posted by **Amber** on Friday, January 4, 2013 at 6:13pm.

For question 1, here's the numbers you use: {20, 18, 17, 19, 22, 29, 16, 27, 24}.

1. Calculate the 50th percentile.

For questions 2 and 3 use this number line: {16, 17, 18, 19, 20, 22, 24, 27, 29, 80}

2. Calculate the z-score for the 80 & explain what it means. (Explain what the z-score is.)

3. Calculate the z-score for the median of the data set.

I've tried doing these problems with no help from my teacher. Please help?

Thanks

- Probability and Statistics -
**MathGuru**, Saturday, January 5, 2013 at 5:03pm
Here are a few hints:

1. The 50th percentile is the median. Put the numbers in order and determine the middle number. If you have an odd data set, the middle number is the median. If you have an even data set, take the middle two numbers, add them, then divide by 2 for the median.

2. Find mean and standard deviation. Then use z-scores. Formula for z-scores is: z = (x - mean)/sd

(Note: x = 80)

3. Determine the median. Use the formula above to calculate the z-score for the median.

I hope this will help get you started.

## Answer This Question

## Related Questions

- Check Statistics - Calculate the first, second, and third quartiles of the ...
- statistics - The weight of a small Starbucks coffee is a random variable with a ...
- Statistics - When calculating percentiles, ie the 33rd percentile, do you use ...
- university of phoenix - The weight of a small Starbucks coffee is a random ...
- Statistics - We are given this table which is Benford law for these questions ...
- math!! - what does median mean...? median is the middle number when u put them ...
- statistics - The number of accidents per week at a hazardous intersection ...
- statistics - The number of hours per week that the television is turned on is ...
- Statistics - 1. Use the following to answer questions: The table below presents ...
- ap stats - based on over 800 housing prices collected at random from the city of...

More Related Questions