رد: للي فاهميــن في الاحصــاء ..
- 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
فيها ترتيب متوسط ثانوي .. الخ
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
the standard normal probability distribution has
a- mean 1 .. standard deviation 0
b- mean 0 ... standard deviation 1
thousand tickets are sold at 100 sar each for a car valued at 50000 sar .
what is the wxpected value of the gain if a person purchases three tickets /
a- -150
b- -190
c- -165
d- -191
المكسب في احتمال الكسب + الخسارة في احتمال الخسارة
المكسب = 49700
احتمال الكسب = 3\1000
الخسارة = -300
احتمال الخسارة 997.
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وسبيرمان ينفع في الاتنين الكمي والوصفي . اذا لاحضتو في البروبلمز حق سبيرمان كتير منها نعمل رانك لاعداد .
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