Marketing
Autor: Diana Olivares • February 23, 2016 • Lab Report • 259 Words (2 Pages) • 457 Views
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Problem #13
13._ Considers that all coins (one cent, 25 cents, etc) that have in your pocket or purse constitute a population. Construct a frequency table, starting with the current year and count regressive way to record the age (in years) currencies. For example, if the year is 2009, a currency that has printed 2007 is two years old.
- Draw a histogram or other graphical distribution of the population.
- Randomly select five coins and record the average age of selected currencies. Repeat the process 20 times. Now draw a histogram or other graphic that shows the sampling distribution of means.
- Compare the two histograms =They are alike.
Sample number | Average age | Sample number | Sample mean |
1 | 7.4 | 11 | 5.8 |
2 | 4.4 | 12 | 6.2 |
3 | 5.6 | 13 | 5.2 |
4 | 7.4 | 14 | 5.4 |
5 | 5.2 | 15 | 6.4 |
6 | 6.4 | 16 | 6.4 |
7 | 6.8 | 17 | 5.6 |
8 | 6.2 | 18 | 5 |
9 | 5 | 19 | 6.2 |
10 | 6.2 | 20 | 5.4 |
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15._ A normal population has a mean of 60 and a standard deviation of 12. Select a random sample of 9. Calculate the probability that the sample mean:
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