للي فاهميــن في الاحصــاء ..

[M0o0o0ry]

1- statistic that tells the number of standard deviations a data value is below the mean is called

a- coefficient of variation b- standard score

2- the student's level of educaton is a..... variable

a- ordinal b-nominal


3- if the numbers 0,1,2,3,4,6,8 represents the number of daily accidents in a given street during last month .
the frequncy table of 90 cars ...

a- has a total frequncy of 90
b- can be represented by bar chart
c- has seven classes
d- a,b and c

the spearman rank correlation cofficient can be calculated for .... variables

a- continuous b- ordinal c- discete d- a,b and c
كلام احمد العم و سعيد الغامدي .... لو تفكر فيها السبيرمن بتاع كلو .. أنا غلط فيها
the standard normal probability distribution has

a- mean 1 .. standard deviation 0
b- mean 0 ... standard deviation 1