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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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
Transcribed Image Text:**Find the standard deviation for the group of data items.**
Below is a stem-and-leaf plot:
| Stems | Leaves |
|-------|--------|
| 0 | 8 |
| 1 | 5 8 |
| 2 | 5 8 |
**Explanation of the table:**
- The "Stems" column represents the leading digit(s) of each data point.
- The "Leaves" column lists the trailing digit(s) that complete the data values.
- Therefore, the data points are: 8, 15, 18, 25, and 28.
**Task:**
Calculate the standard deviation of these data points. \( \text{(Round to two decimal places as needed.)} \)
The standard deviation is \( \_\_\_ \).
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- The amount of caffeine in a sample of five-ounce servings of brewed coffee is shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Click the icon to view the histogram. Complete the table. Round values to the nearest tenth as needed. Graph/chart f Midpoint x xf 70.5 Ay 30- 92.5 26 25- 114.5 136.5 20- 158.5 15- 12 Ef = Exf = 10- Find the mean of the data set. 5- X = (Round to the nearest tenth as needed.) 48.5 70.5 92.5 114.5 136.5 158.5 Complete the table. Round values to the nearest tenth as needed. Midpoint x (x-x)? (x-x)?f X-X 70.5 Print Done 92.5 114.5 136.5 158.5 (x-x)?r= ] ofarrow_forwardinstructor gives a 100-point examination in which the grades are normally distributed. The mean is 66 and the standard deviation is 5. If there are 5% A's and 5% F's, 15% B's and 15% D's, and 60% C's, find the scores that divide the distribution into those categories. Round the cutoff scores to the nearest whole number. Round intermediate z-value calculations to 2 decimal places. A:_- B: C: D: --- F: _-_arrow_forwardFind the range and standard deviation of the set of data. 3 7,8, 10, 12, 14 e The range is 11 (Simplify your answer.) The standard deviation is (Round the final answer to the nearest hundredth as needed. Round all intermediate values to the nearest hundredth as needed.)arrow_forward
- A. Population ? B. Population mean ? C. Median ? F. IQR ? G. Population standard deviation ?H. population variance ?arrow_forwardplease shows that stepsarrow_forwardThe numbers of courses taught per semester by a random sample of university professors are shown in the histogram. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Make a frequency distribution for the data. X 1 3 f Number of professors 25- 20- 15- 10- 4 20 23 15 1 2 3 4 Number of courses taught per semesterarrow_forward
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