    0

# What is the class mark of class interval 10.5-17.5 and class size 7?

Updated: 12/13/2022 Wiki User

10y ago

Class mark = (10.5 + 17.5)/2 = 14

Class mark = (10.5 + 17.5)/2 = 14

Class mark = (10.5 + 17.5)/2 = 14

Class mark = (10.5 + 17.5)/2 = 14 Wiki User

10y ago   Wiki User

10y ago

Class mark = (10.5 + 17.5)/2 = 14   Earn +20 pts
Q: What is the class mark of class interval 10.5-17.5 and class size 7?
Submit
Still have questions?  Related questions

### What is class interval size?

The class interval for each interval is the difference between its upper limit and its lower limit.

### What is the sum of the product of the frequencies and the square of the class marks (ΣfX²60,55,40,48,52,36,50?

Step 1: Find the midpoint of each interval. Step 2: Multiply the frequency of each interval by its mid-point. Step 3: Get the sum of all the frequencies (f) and the sum of all the fx. Divide 'sum of fx' by 'sum of f ' to get the mean. Determine the class boundaries by subtracting 0.5 from the lower class limit and by adding 0.5 to the upper class limit. Draw a tally mark next to each class for each value that is contained within that class. Count the tally marks to determine the frequency of each class. What is this? The class interval is the difference between the upper class limit and the lower class limit. For example, the size of the class interval for the first class is 30 – 21 = 9. Similarly, the size of the class interval for the second class is 40 – 31 = 9.

### The suggested interval size of the class intervals for a histogram can be estimated by?

highest value-lowest value/number of classes

### Why the median changes by changing the size of class intervals in frequency ditribution?

Because median is the mid of the class intervals. Therefore, it is a positional measurement. Hence, if the size of class interval increases or decreases then the middle position will also increase or decrease and thus median.

56

### What happens to the confidence interval if you increase the sample size?

The confidence interval becomes smaller.

### How do you work out frequency density?

basically this is an exampleAGE (YEARS) FREQUENCY FREQUENCY DENSITYFD= Frequency DensityAge : 0

### How do you determine the skip interval in systematic sampling?

Assuming that you know the population size, N, and that you are confident that the sample size, n, you have chosen is adequate, then the skip interval is ~n/N. For example, if the populaton size if 998 and you reckon that you need a sample size of 20 then the skip interval would be 50.

### What happens to width of interval if you decrease the sample size?

It will decrease too. * * * * * If it is the confidence interval it will NOT decrease, but will increase.

### What happens to the width of the confidence interval when you are unable to get a large sample size?

The width of the confidence interval increases.

### Effect on the width of the confidence interval when sample size is increased?

In general, the confidence interval (CI) is reduced as the sample size is increased. See related link.

### How to find acceleration?

Acceleration has two parts ... its size and its direction.To find the size (magnitude):-- pick a time interval-- measure the speed at the beginning of the interval-- measure the speed at the end of the interval-- subtract the speed at the beginning from the speed at the end-- divide that difference by the length of the time interval-- the result is the magnitude of acceleration during that time interval