SP3

Question 1

Mean

Answer 1

The arithmetic mean, the sum of all the data divided by the number of data. Nothing else…

Question 2

represent the sample mean

Answer 2

x^-

Question 3

median

Answer 3

median value, Q2 or M. That is the value such that there are 50% of the data less than this value and 50% of the data bigger than this value. When you have an odd number of data n, pick the middle value, that is, the (n+1)/2th value.

Question 4

Mode

Answer 4

it is the most frequent value. There can be more than one mode in a data set as long as those values have the same frequency and that frequency is the highest.

Question 5

Law of Large Numbers

Answer 5

says that if you take samples of larger and larger size from any population, then the mean x¯ of the sample is very likely to get closer and closer to µ.

Question 6

the standard deviation

Answer 6

Standard deviation is a statistical measure that quantifies the amount of variation or dispersion in a set of data values relative to its mean.