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When can the mean be the largest value in the data set?
When the data set consistys of a single value.
What is the least value of the data set?
The least value of the data set is called the minimum.
There are 100 values in the set The median is 90 the mean is 95 Increase the highest value in the data set by 200 Now what are the median and the mean of the data set?
The median is the middle value (or mean of the two middle values if there are an even number of values) and so is unaffected by an increase in the highest data value. It is still 90. The mean was 95, so the total for the data set was 95x100 = 9500. If the highest data value is increased by 200, the data set total is also increased by 200, giving a new data set total of 9500 + 200 = 9700, so the new mean is 9700/100 = 97.
What is meant by the standard deviation of a data set?
It is a measure of the spread of the data around its mean value.
Definition of mean median and mode?
Mean is the average of the data set values. Median is the middle number in the data set (set up in ascending or descending order). Mode is the data value (or values) that occur the most number of times.
When can the mean be the largest value in the data set?
When the data set consistys of a single value.
What is the least value of the data set?
The least value of the data set is called the minimum.
What is a value much greater or much less than the others in a data set?
A value that is significantly higher or lower than the other numbers in a set are called extremes. They are sometimes excluded from calculations like the mean (average) but sometimes they are included.
There are 100 values in the set The median is 90 the mean is 95 Increase the highest value in the data set by 200 Now what are the median and the mean of the data set?
The median is the middle value (or mean of the two middle values if there are an even number of values) and so is unaffected by an increase in the highest data value. It is still 90. The mean was 95, so the total for the data set was 95x100 = 9500. If the highest data value is increased by 200, the data set total is also increased by 200, giving a new data set total of 9500 + 200 = 9700, so the new mean is 9700/100 = 97.
Can the mean be greater than the greatest value in a data set?
No.
A data set has 9 values The mean of the set is 5 When a tenth value is added the mean becomes 6 What is the tenth value?
15
What is meant by the standard deviation of a data set?
It is a measure of the spread of the data around its mean value.
Why is it helpful to find the mean of a data set?
It is one of the key measures of a data set: it shows the value around which the observations are spread out.
Can there be more than one mean in a set of numbers?
No. But there can be more than one data point which has the same value as the mean for the set of numbers. Or there can be none that take the mean value.
Would you use mean mode median to average the points?
mean is the average of numbers in the data set mode is the most frequently occurring value in a data set and median is the middle number of the data set so you would use mean
What value shows how the data set as a whole is spread around the mean?
variance
What is the minimum data value in a data set?
The minimum data value in a data set is simply the lowest value of the set (easily found by arranging the set from lowest-highest values in an excel sheet or by hand).
