What are some measures of center and how are they calculated?
The two most widely used measures of the “center” of the data are the mean (average) and the median. To calculate the mean weight of 50 people, add the 50 weights together and divide by 50 . To find the median weight of the 50 people, order the data and find the number that splits the data into two equal parts.
What are the three measures of spread?
Measures of spread include the range, quartiles and the interquartile range, variance and standard deviation.
What is the mean of 7/5 10 and 2?
I can’t add an answer for some reason but here it is. Answer: 6 Explanation: sum up the numbers and then divide the answer you get with the numbers you added up, divide it by how many numbers their are. In this case there is 4 numbers, so divide 24 and 4 and you get your answer: 6 !
Where do we use averages in everyday life?
Uses of average in daily life: To determine the performance of the different classes within a school, instead of comparing the marks of each student of each class we just find the average marks of a particular class and compare it with the average of the other.
Where is mode used?
The mode is the least used of the measures of central tendency and can only be used when dealing with nominal data. For this reason, the mode will be the best measure of central tendency (as it is the only one appropriate to use) when dealing with nominal data.
What are the uses of average?
Learning about average helps us to quickly summarize the available data. The large set of marks of the students, the changing price of the stocks, the weather data of a place, the income of different people in a city, are all examples for which we can calculate an average.
What is the average weight for a 12 year old?
The averages for 12-year-olds are 89 pounds, for males, and 92 pounds, for females. However, beyond biological sex, many other factors influence someone’s weight at this age, including their height, body composition, the onset of puberty, environmental factors, and underlying health issues.
What is the formula for median of grouped data?
The class whose cumulative frequency is greater than the value N2 is called the median class. From the table above, we have l=20, N=17, F=6, f=5 and h=10. Therefore, the median marks is 25….Finding the Median of Grouped Data.
| Marks out of 50 | Frequency | Cumulative frequency |
|---|---|---|
| 20-30 | 5 | 11 |
| 30-40 | 4 | 15 |
| 40-50 | 2 | 17 |