In an exam attended by 1000 people, the average of the grades is 57 and the standard deviation is 6.2, showing a normal distribution. 56 samples of n=25 people were taken from this population to the returned lottery. How many of these 56 samples averaged in the range of [57-59]. a) 45 B) 10 C) 55 D) 38 E) 2
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
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In an exam attended by 1000 people, the average of the grades is 57 and the standard deviation is 6.2, showing a
a) 45
B) 10
C) 55
D) 38
E) 2
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